1 a) Physical change b) chemical change c) chemical change d) physical change 2 cooking of food is a chemical change because new substances are formed when food is cooked. Also it is an irreversible change. 3 during physical changes no new substance is formed whereas during chemical changes new substances with entirely new properties are formed. Physical changes are reversible whereas chemical changes are irreversible. There is usually no change of mass during a physical change whereas in a chemical changes there is generally a change in mass
Q 1 a - physical change b- chemical change c- chemical change d- physical change Q 2 Ans cooking of food is a chemical change because it involves the variation in the chemical composition of the material while cooking or the final inference comes out after cooking Q 3 Ans a - in a chemical change new substance is formed while in a physical change no new substance is formed b - a chemical change is irreversible whereas a physical change is reversible c - difference in mass ( chemical change ) no difference in mass of object ( physical change )
Excellent! All your answers are correct :) Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/chemistry/matter-in-our-surroundings/l/physical-and-chemical-changes
Q1.a)Physical Change b)Chemical Change c)Chemical Change d)Physical Change Q2.Cooking of food is a 'Chemical Change' because, the process cannot be reversed as well as a new substance is formed by combing all the components. Q3.3 differences between Chemical changes and Physical Changes are:- i)Chemical changes cannot be reversed whereas, Physical changes are generally reversible. ii)Chemical changes always result in the formation of a new substance whereas, Physical changes do not result in the formation of new substances. iii)In Chemical changes, the mass of the substance generally changes but in Physical changes, the mass of the substance remains constant.
Q1. a.physical change b.chemical change c.chemical change d.physical change Q2. The cooking of food is a chemical change as the cooked food is irreversible and new substances are formed. Q3. Physical change. | Chemical change 1. It is reversible. | 1. Its irreversible 2. No new substances are formed. | 2. New substances are formed 3. Its mass/weight doesn’t change | 3. Its mass/weight changes
Physical change 1.Boiling of water 2. Cutting of wood. Chemical changes 1. Respiration. 2.rusting of iron. Q2.cooking of food is a chemical change because a new is formed and it is irreversible. Q3. Physical changes 1.it is easily reversible. 2. No new substance is formed. 3. The mass remains the same i.e there is no changes in the mass of such substance that under goes the physical change. Chemical changes. 1. New substance is entirely formed . 2.it is irreversible. 3. There is changes in mass of the substance that undergoes the chemical changes.
Q. 1. (a)Physical as nothing new is formed. (b)Chemical as the chemical properties are changed (c)Chemical as by respiration we break the food by oxygen and form glucose , carbon dioxide and water with ATP molecules so something new is formed that's why it is a chemical process. (d)As only the physical properties of it are changed (i.e. Shape here ) Q. 2. Cooking is a chemical process as something new is formed in this process. Q. 3. 1.Physical changes are usually irreversible and chemical changes are always reversible. 2.New substances are formed in a chemical change and no new substances are formed in a physical change. 3. In a Chemical change more energy is released than a physical change .
Sir Q1 answer is i) boiling of water to form steam is a physical change. passing of electric current, through water and the water breaking down into hydrogen and oxygen gases is a chemical change. ii) The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. Rusting would only be a physical change if iron molecules remained pure iron throughout the process. iii) it is a chemical change because it is taking in oxygen and utilizing it to release energy as energy is released so it is a chemical change. whereas breathing is a physical change as it is just taking in oxygen. iv) Cutting of trees is a chemical change since all chemical reactions stop and we cannot get back the original tree from the wooden peacesMelting of butter in a pan is a physical change since there is no change in the chemical composition of butter, only the physical state changes from solid to liquid. Q2answer Cooking of food is a chemical process since it involves changes in the chemical composition of food. Heating food at high temperature and adding additives such as oil, butter, baking powder etc results in the breaking down of chemical substances present in food and formation of new chemical substances. Q3answer Sl. No. Differentiating Property Physical Change Chemical Change 1 Explanation In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. 2 Example Some example of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc. 3 Reversibility Physical change is easily reversible i.e original substance can be recovered. Chemical change is irreversible i.e. original substance cannot be recovered.
1)*Chemical change- rusting of iron, respiration *Physical change- boiling of water, cutting of wood 2)cooking of food is chemical change because after cooking the raw ingredients or vegetables cannot be regained again. 3) *chemical change- 1)new substance are formed ,irreversible 2)mass of substance changes 3) energy changes large *Physical change-1) no new substances are formed and reversible 2)mass of substance remains same 3) energy changes small
ANSWER 1 :(a) Boiling of water is a physical change as if we boil that water in a container it will have the same mass as it had before boiling. (b)Rusting of iron is chemical change as new substance is formed from iron (i.e. Iron oxide is formed). (c) Respiration is a chemical change as new substances are formed (i.e. energy, water, carbon-dioxide ) from The breaking down of glucose from oxygen. (d) Cutting of wood is a physical change as no new substance is formed in the cutting of this wood but it is an Exceptional case like breaking of glass which can cannot be reversed similarly this also cannot be reversed but No new substance is formed which is more important therefore it is a physical change. ANSWER 2 :Cooking of food is a chemical change as new substances are formed from the raw Ingredients and it cannot be reversed, therefore it is a chemical change. ANSWER 3 : (1)Physical changes are reversible such as boiling of water , melting of ice cubes whereas chemical changes are irreversible.such as cooking of food,digestion of food. (2)New substances are formed in a chemical change such as when we cook food from raw ingredients we get some delicious food which is not as the ingredients whereas no new substances are formed in Physical changes such as cutting of wood. (3) Physical changes are usually temporary whereas chemical changes are permanent. BTW sir you are an awesome teacher you teach the subject of science the best in whole youtube Thanku for your such a great help.and never stop from making such amazing videos. Regards: ------- Naman Belwal ----------
Q1: a) Boiling of water - Physical change b) Rusting of iron - Chemical change c) Respiration - Chemical change d) Cutting of wood - Physical change Q2: Cooking of food is a chemical change. When food is cooked, chemical reactions occur, such as the Maillard reaction, which changes the composition and properties of the food, leading to the formation of new substances with different chemical compositions and properties. Q3: 1. Physical changes do not involve the formation of new substances, while chemical changes do. 2. Physical changes usually involve changes in state or appearance, while chemical changes involve changes in chemical composition. 3. Physical changes are usually reversible by physical means (such as melting, freezing, or dissolving), while chemical changes are often irreversible or require specific chemical reactions to reverse.
q1 a physical change because we can bring it back to room temparature by cooling it so its reversible and no new substance is formed b chemical change because rusting of iron is an irreversible change and a new substance 'rust" is formed c respiration is a chemical change. Oxygen is taken during the respiration,the output should be also the oxygen in order to make it a physical change. ... That's why it is considered as a chemical reaction where the initial compound is oxygen and final compound is carbon dioxide. dCutting of wood is a physical change because only physical property of wood is changed and no new substance is formed. the properties of wood remains the same. Q2 Cooking of food is a chemical process since it involves changes in the chemical composition of food. Heating food at high temperature and adding additives such as oil, butter, baking powder etc results in the breaking down of chemical substances present in food and formation of new chemical substances. Q3physical changes are reversible and no new substance is formed while chemical changes are irreversible and new substance is formed physical changes are temporary while chemical changes are permanant the mass of a substance which is reversible[physical changes] usually remains same mass of substance which is irreversible [chemical changes] usually changes THANKS A LOT FOR HELPING ME LEARN VERY EASILY
ANSWER 1: a)PHYSICAL b)CHEMICAL c)CHEMICAL d)PHYSICAL ANSWER 2: CHEMICAL CHANGE BECAUSE NEW SUBSTANCE IS FORMED AND IS IRREVERSIBLE. ANSWER 3: PHYSICAL: NO NEW SUBSTANCE IS FORMED, REVERSIBLE, MASS OF SUBSTANCE DOESN'T CHANGE CHEMICAL: NEW SUBSTANCE IS FORMED, IRREVERSIBLE, MASS OF SUBSTANCE CHANGES
1.a)Physical change b)Chemical change c)Chemical change d)Physical change 2.Cooking of Food is Chemical change because the energy increases,mass changes,new substance is formed and it is irreversible. 3.Physical Change- Chemical Change- i) No new substance is formed i)New substance is formed ii)Reversible ii)Irreversible iii)Temporary change iii)Permanent change ;Thank you for the useful video
Q1 a- Physical change b- Chemical change c- Chemical change d- Chemical change Q2 Chemical change as a new substance is formed. Q3 PHYSICAL CHANGE No change of mass No new substance is formed It can be reversed CHEMICAL CHANGE Change of mass occurs New substance is formed It can't be reversed
Very good!! All your answers are correct except Q1 (d) will be physical change. Since when a log of wood is cut, it is broken into smaller pieces. No new substance is formed. Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/chemistry/matter-in-our-surroundings/l/physical-and-chemical-changes
Q1 a and d are the physical changes and the rest are the chemical changes Q2 cooking of food in a chemical changes because when the food is cooked it cannot be changed back into its orignal state theta why it is a chemical changes Q3 Physical changes 1 they are reversible 2 They are temporary 3 and there is no new substance is form Chemical change is reverse than the physical changes
Q1: A: physical B: Chemical C:physical d:physical Q2: Yes because you cant undo it. If you bake a pie , the pie/pizza/doughnut will always be cooked, you cant undo it. Q3: A chemical change can not be undone, a physical changes mass stays the same and , in a physical change the outside/shape/form can be different but the inside says the same
1.a)Physical Change b)Chemical Change c)Chemical Change d)Irreeversible Physical Change 2. Yes, Cooking of food is a chemical change as a new substance is formed and the proccess cannot be reversed. 3.Chemical Change •Irreversible •New substance is formed •Mass Changes (without gases counted) Physical Change •Usually Reversible •No new Substances are formed •Mass doesn't change Thank you for well explained video!
Q1. a,physical change b,chemical change c, chemical change d,physical change Q2. It is a chemical change because new substance is formed. Q3. 1.Physical changes are reversible. 1.Chemical changes are irreversible. 2.No new substance form in Physical changes. 2.new substance form in chemical changes 3.there is no change in mass during physical change. 3.there is change in mass during chemical change
Question 1 a)Physical change since we only changing the phase of water,no new substances are formed b)Chemical Change,rust is a new substance formed when iron reacts with oxygen C)Chemical change since it is the breakdown of food consumed to produce energy,also because it is irreversable and there is large energy change D)Physical change,no new substances formed since we only cutting the wood,we not burning to release energy in the air.It's still wood even though it's cutting Question 2: Chemical change,it is irreversable and there is large energy change(heat produced) Question 3: Physical change-No new substances formed,reversable,mass stays the same,small energy change Chemical change-new substances formed,irreversable,mass changes,large energy change
1.a) Physical change 1.b) Chemical change 1.c) Chemical change 1.d) Physical change 2. Chemical change. Because heat is being absorbed and produces a new component. 3. Physical change - mostly reversible, does not produce a new substance and temporary. Chemical change - irreversible, produces a new substance and permanent.
Q1 Boiling of water and cutting of wood are physical changes. Rusting of iron and respiration are chemical changes. Q2 Cooking of food is a chemical change because it forms new substances and you cannot reverse the food. Q3 1.Physical changes form no new substances but a chemical change forms new substances. 2.Chemical changes are permanent but a physical change is temporary. 3. Chemical changes involve heat, light and electrical energy but physical changes do not
Question 1: a) Physical change b) Chemical change c) Chemical change d) Physical change Question 2: Cooking of food is a chemical change as it involves new substances being formed(cooked products, gases), energy (heat) being needed and it is an irreversible change. Question 3: Physical | Chemical It is a reversible It is a irreversible change. change. New substances New substances are not formed. are formed No energy is being Energy is being released or released or absorbed absorbed
Q1: A.) Physical Change B.) Chemical Change C.) Chemical Change D.) Physical Change Q2: Cooking of foods is a chemical change because after cooking there is a new substance formed, and it is irreversible. Q3: In chemical change there is/are new substance formed, it's irreversible, and the mass of a substance change. While in physical change there is no new substance formed, it's reversible, and the mass of a substance remains the same. JHENNICA JOY C. GARCIA 8-K
Q 1. a)physical change b)chemical change c)chemical change d)physical change Q 2. Cooking is a chemical change because when we cook the raw vegetables , cereals ,etc. then we get a new substance with new properties with a different taste and colour which can't be reversed. For example, if we make a potato fry then, the raw potato is very much different from the cooked one. It also tastes and smells different from the raw one. Thus, from this we can make out that cooking is a chemical change. Q 3. The three difference between chemical and physical change is that, chemical change are irreversible but physical changes are reversible, a new substance is formed in chemical change but no new substance is formed in a physical change and the energy change is large in chemical change but in a physical change it is small.
Q1 a) physical change b)chemical change c)chemical change d) physical change Q2 Cooking of food is a chemical change because new substances are formed. Q3 physical changes: No new substances are formed Are reversible Mass doesnt change Chemical changes : just the opposite
Ans 1 a. Physical change b. Chemical change c. Chemical change d. Physical change Ans 2 Chemical change because once we cook the food new substance are formed and are irreversible Ans 3 Physical change Changes which are temporary Changes which are reversible No new substance are formed. Chemical change Changes which are permanent Changes which are irreversible New substance are formed.
A:-1.a) Physical change b) Chemical change c) Chemical change d) Physical change A:-2. Cooking of food is a chemical change because it is a new substance that is formed and it is also irreversible. A:-3. Chemical change - I) new substance is formed II) irreversible III) Mass will change. Physical change - I) no new substance is formed II) reverseble III) Mass will not change.
Q1 A) Physical change. B) Chemical change C) Chemical change D) Physical change Q2= Cooking of food is chemical change because a new substance is formed . Q3 Physical change 1. In a physical change no change of substance. 2.Reversible. 3.The mass stays the same. Chemical change 1.A new substance formed. 2.Irreversible. 3.Mass changes.
1. boiling of water is a physical change rusting of iron is a chemical change respiration is a chemical change cutting of wood is a physical change 2. Yes, because the mixing of ingredients form new substances. 3. physical change does not form any new substances, change in the state of matter, mass of the substance does not change chemical change does form new substances, reacts, mass of the substance usually changes
Physical changes: Boiling of water. Cutting of wood. Chemical changes: Respiration. Rusting of iron. Cooking of food is a chemical change because 1.it is irreversible. 2.a lot of energy is produced. 3. A new substance is formed. Physical changes: No new substance is formed. It is reversible. Little energy is produced. Chemical changes: Me substances are formed. It is irreversible. Lot of energy is produced.
1) a] PHYSICAL CHANGE , b]CHEMICAL CHANGE , c] CHEMICAL CHANGE , d] PHYSICAL CHANGE 2) COOKING OF FOOD IS CHEMICAL CHANGE AS A COMPLETELY NEW SUBSTANCE IS FORMED FROM THE RAW MATERIALS, AND IT IS IRREVERSIBLE
boiling of water and cutting of wood is physical change rusting of iron and respiration is chemical change Cooking of food is a chemical change as it involves the change in the composition of thefood. After cooking, the raw ingredients of the vegetables cannot be regained. change affects only physical properties i.e. shape, size, etc. Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc
11:38 Q1 a- physical change b- chemical change c- chemical change d- physical change Q2- It's a chemical change because the new substances that are formed cannot be made back to the raw food. Also their composition must have changed as the cells of the food are heated. Q3- Difference one- new substances are formed in chemical change but not in physical change Difference two- lot of energy is produced during chemical change but very less energy is produced during physical change. Difference three- chemical changes are irreversible/permanent but most physical changes are reversible (there are exceptions too).
Q1.a) physical change b)chemical change c) chemical change d) physical change Q2. Cooking is chemical change as we cannot change a cooked food to raw. Q3. 1.Chemical change A.irreversible B. new substance is formed C. Mass does not remains same 2.Physical change A.reversible B. No new substance is formed C. Mass remains same.
Question 1. Physical changes Physical b)chemical change c)chemical change d)physical change Question 2. Cooking raw vegetables, cereals, etc. produces a new substance with a different taste and colour that cannot be reversed. The raw and cooked potato differ significantly in a potato fry, for example. Furthermore, the raw one has a different taste and smell. Cooking is the result of a chemical change, as we can see from this. Q 3. There are three major differences between chemical and physical change: Chemical changes are irreversible while physical changes are reversible; Chemical changes create new substances while physical changes do not; and Chemical changes generate large energy changes while physical changes are relatively small. Show less
Q1: (A) because he is still liquid but heated so physical and chemical changes Q2: it's chemical change because if you cook it, it produce gas and its state Q3: Physical change:the weight of substance doesn't change, temporarily change which can reverse,No new substance is formed. Chemical change: changing color,produce bubbles, irreversible. This is my answer thank you for teaching us
Q1 Ans - A. Physical B. Chemical C. Physical D. Chemical Q2 It's chemical change because the new substance are formed. Q3. Physical change - 1. Reversible 2. No new substance is form. 3. Doesn't change its mass
1st answer:a)boiling of water is physical change,b)rusting of iron is physical change,c)respiration is chemical change and d)cutting of wood is physical change. 2nd answer: Cooking of food is a chemical change because the our food changed after cooking.It's condition is changed after cooking from the condition of food before. 3rd answer:Physical changes Chemical changes 1)is temporary 1)is permanent 2)does not change its mass 2)changes its mass 3)no new substance is formed 3)new substance is formed
A) boiling of water is physical B) rusting of iron is chemical C) respiration is chemical D) cutting of wood is physical Q2 Cooking of food is chemical due to the evidence new substances are formed also it is irreversible and the mass is also changing Q3 Chemical changes are irreversible, the mass usually change and new substances are formed While in physical changes no new substances formed, it is reversible and the mass does not change
I like your channel than other channels. You teach very good and do not teach very fast or very slow. I hope that you will make more videos. All the best for future and keep making such videos. Thank you
Ans 3 - 1) No new substances will form in physical change but in chemical change new substances will form. 2) In physical change, the mass will be same only but in chemical change, the mass will become less. 3) In physical change, the change will be usually reversible but in chemical change, the change will be irreversible only.
ANSWERS... Q1.a. physical change b. chemical change c.chemical change d. physical change Q.2 Physical Q.3. CHEMICAL CHANGE - New substance formed , irreversable PHYSICAL CHANGE - No new substance formed , reversible
Q1; Bioling of water,respiration,(cutting of wood are physical changes can be reversible) Rusting of iron is a chemical change Q2;Cooking of food is chemical change Q3; CODE:New substances in a chemical change makes mass changes and irrereversible(permenant) and energy changes large other wise physical change .
Respiration is a chemical change, when we inspire o2, it reacts with glucose in cells, to give out co2 and h20. Hence chemical change since new substance is being formed.
I wish I could be your daughter so I can learn more from you or so intelligent like you......I understood better than my school teachers thankyou so much sir
Q10 Ans - A. Physical B. Chemical C. Physical D. Chemical Q2 It's chemical change because the new substance are formed. Q3. Physical change - 1. Reversible 2. No new substance is form. 3. Doesn't change its mass Chemical changes - 1. Irreversible 2. New substance forms 3. Changes its mass
Question 1: A.)Physical Change B.)Chemical Change C.)Chemical Change D.)Physical Change Question 2: Cooking food is a chemical change because of the mass changes, irreversible, and energy increases, and a new substance is formed. Question 3: In a physical change, no new substance is formed, is reversible, and the energy decreases. In a chemical change, a new substance is created. What you have made is irreversible, and the energy increases. Please get back to me sir. I am learning about this in class right now. Thank you P.S. I honestly don't know if I can survive Math class and Science class without you. Thank you once again.
Answers: Q1) a. Physical change b. Chemical change c. Chemical change d. Physical change Q2) Cooking of food is obviously, a chemical change since the raw vegetables when cooked cannot be reversed back into raw vegetables hence, cooked food / vegetables are completely new substances from the raw vegetables or we can take example as chapati, raw wheat chapati is completely different from cooked chapati hence we can say that cooked chapati is a new substance because it cannot be reversed back into raw chapati. Q3) i. In physical change no new substance is formed whereas in chemical change new substance is formed with new properties. ii. The changes can be reversed in physical change but not in chemical change. iii. The mass of the substance after a physical change and before it remains the same but, in case of chemical change the mass of the substances generally changes but if we compare the total mass of the reactant side and total mass of product side it remains the same.
Q1. Physical changes; Boiling of water and cutting of wood. Chemical changes; Rusting of iron and respiration. Q2. Chemical change, bcuz new substance is formed and the food is irreversible. Q3. Physical changes; No new substance is formed but chemical change, new substance is formed. Physical changes, reversible but, chemical change, irreversible. Chemical change, mass of substance usually change but, physical changes, mass substance remain the same.
1 a physical change B chemical C chemical change D physical change 2 cooking of food is a chemical change as it is the finished result of a bunch of ingredients mixed with each other and put under sudden temperature changes. All of this helps the ingredients react with each other to the point that we get something that tastes completely different than the raw materials. 3 ! Physical changes are usually reversable whereas chemical changes are not. ! Physical change can change the shape or size of the substances whereas chemical changes are the combination or result of two or more atoms (changes chemical properties ! New substances are formed in chemical changes whereas new substances aren't formed in physical vhanges
Que 1. a) physical change b) chemical change c) physical change d) chemical change Que 2. cooking of food is a chemical change because earlier they were raw material but after cooking it become cooked food.. Que 3. physical change : no new substance is formed chemical change : new substance is formed physical change: reversible chemical change : irreversible physical change : mass remain constant chemical change : difference in masses
Q1.a Physical change b.chemical change c.chemical change d.physical change Q2.It is a chemical change because a new substance is formed. Q3.1.Physical change physical change is reversible 2.no new substance is formed 3.the weight of a substance remains the same even though the state changes Chemical change 1.It is irreversible 2.new substance is formed 3.the weight of a substance changes
1a. Physical change b. Chemical change c. Physical change d. Chemical change 2. Cooking is a chemical change because, the cooked food can not be reversed back 'raw' 3. The three differences blw physical and chemical changes are; a. Physical change can be reversed b. Physical change maintain its mass as d same c. New substance are formed. While A. Chemical change can't be reversed b. No new substance formed c. Differs in masses
Q1. a) physical change b) chemical change c) chemical change d) chemical change Q2. chemical change, because there would be a change of mass,new substances are formed and irreversible. Q3. Physical change=1)no new substances are formed.2) reversible 3)energy change are small Chemical change=1)new substances are formed 2) irreversible 3) energy change are large.
Q1 A) physical change B) chemical change C) chemical change D) physical change Q2 Cooking of food is a chemical change Because new substance is formed And is irreversible Q3 Physical change No new substance is formed It is reversible It is temporary Chemical change New substance is formed It is irreversible It is permanent. Thank you sir it had help me a lot to learn
Ans 1 a) boiling of water and d) cutting of wood is physical change..and b) rusting of iron and c) respiration is chemical change. Ans 2 Cooking of food is physical change because after we cook and dish like pulses (dal) after it cooked we can't reverse it.
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1 a) Physical change
b) chemical change
c) chemical change
d) physical change
2 cooking of food is a chemical change because new substances are formed when food is cooked. Also it is an irreversible change.
3 during physical changes no new substance is formed whereas during chemical changes new substances with entirely new properties are formed. Physical changes are reversible whereas chemical changes are irreversible. There is usually no change of mass during a physical change whereas in a chemical changes there is generally a change in mass
False bro , some things are wrong ,
Q 1
a - physical change
b- chemical change
c- chemical change
d- physical change
Q 2
Ans cooking of food is a chemical change because it involves the variation in the chemical composition of the material while cooking or the final inference comes out after cooking
Q 3
Ans a - in a chemical change new substance is formed while in a physical change no new substance is formed
b - a chemical change is irreversible whereas a physical change is reversible
c - difference in mass ( chemical change ) no difference in mass of object ( physical change )
Excellent! All your answers are correct :) Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/chemistry/matter-in-our-surroundings/l/physical-and-chemical-changes
Sir plzz explain in and use hindi words
Thanks a lot sir
Q1.a)Physical Change
b)Chemical Change
c)Chemical Change
d)Physical Change
Q2.Cooking of food is a 'Chemical Change' because, the process cannot be reversed as well as a new substance is formed by combing all the components.
Q3.3 differences between Chemical changes and Physical Changes are:-
i)Chemical changes cannot be reversed whereas, Physical changes are generally reversible.
ii)Chemical changes always result in the formation of a new substance whereas, Physical changes do not result in the formation of new substances.
iii)In Chemical changes, the mass of the substance generally changes but in Physical changes, the mass of the substance remains constant.
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Q1. a.physical change b.chemical change c.chemical change d.physical change
Q2. The cooking of food is a chemical change as the cooked food is irreversible and new substances are formed. Q3. Physical change. | Chemical change 1. It is reversible. | 1. Its irreversible 2. No new substances are formed. | 2. New substances are formed 3. Its mass/weight doesn’t change | 3. Its mass/weight changes
Physical change
1.Boiling of water 2. Cutting of wood.
Chemical changes
1. Respiration.
2.rusting of iron.
Q2.cooking of food is a chemical change because a new is formed and it is irreversible.
Q3. Physical changes
1.it is easily reversible.
2. No new substance is formed.
3. The mass remains the same i.e there is no changes in the mass of such substance that under goes the physical change.
Chemical changes.
1. New substance is entirely formed .
2.it is irreversible.
3. There is changes in mass of the substance that undergoes the chemical changes.
Q. 1. (a)Physical as nothing new is formed.
(b)Chemical as the chemical properties are changed
(c)Chemical as by respiration we break the food by oxygen and form glucose , carbon dioxide and water
with ATP molecules so something new is formed that's why it is a chemical process.
(d)As only the physical properties of it are changed (i.e. Shape here )
Q. 2. Cooking is a chemical process as something new is formed in this process.
Q. 3. 1.Physical changes are usually irreversible and chemical changes are always reversible.
2.New substances are formed in a chemical change and no new substances are formed in a physical change.
3. In a Chemical change more energy is released than a physical change .
Sir Q1 answer is i) boiling of water to form steam is a physical change. passing of electric current, through water and the water breaking down into hydrogen and oxygen gases is a chemical change.
ii) The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. Rusting would only be a physical change if iron molecules remained pure iron throughout the process.
iii) it is a chemical change because it is taking in oxygen and utilizing it to release energy as energy is released so it is a chemical change. whereas breathing is a physical change as it is just taking in oxygen.
iv) Cutting of trees is a chemical change since all chemical reactions stop and we cannot get back the original tree from the wooden peacesMelting of butter in a pan is a physical change since there is no change in the chemical composition of butter, only the physical state changes from solid to liquid.
Q2answer Cooking of food is a chemical process since it involves changes in the chemical composition of food. Heating food at high temperature and adding additives such as oil, butter, baking powder etc results in the breaking down of chemical substances present in food and formation of new chemical substances.
Q3answer
Sl. No. Differentiating Property Physical Change Chemical Change
1 Explanation In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed.
2 Example Some example of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
3 Reversibility Physical change is easily reversible i.e original substance can be recovered. Chemical change is irreversible i.e. original substance cannot be recovered.
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1)*Chemical change- rusting of iron, respiration
*Physical change- boiling of water, cutting of wood
2)cooking of food is chemical change because after cooking the raw ingredients or vegetables cannot be regained again.
3) *chemical change- 1)new substance are formed ,irreversible
2)mass of substance changes
3) energy changes large
*Physical change-1) no new substances are formed and reversible
2)mass of substance remains same
3) energy changes small
is it correct it is also my doubt....
It's right answer
ANSWER 1 :(a) Boiling of water is a physical change as if we boil that water in a container it will have the same mass as it had before boiling.
(b)Rusting of iron is chemical change as new substance is formed from iron (i.e. Iron oxide is formed).
(c) Respiration is a chemical change as new substances are formed (i.e. energy, water, carbon-dioxide ) from
The breaking down of glucose from oxygen.
(d) Cutting of wood is a physical change as no new substance is formed in the cutting of this wood but it is an
Exceptional case like breaking of glass which can cannot be reversed similarly this also cannot be reversed but
No new substance is formed which is more important therefore it is a physical change.
ANSWER 2 :Cooking of food is a chemical change as new substances are formed from the raw
Ingredients and it cannot be reversed, therefore it is a chemical change.
ANSWER 3 :
(1)Physical changes are reversible such as boiling of water , melting of ice cubes whereas chemical changes are irreversible.such as cooking of food,digestion of food.
(2)New substances are formed in a chemical change such as when we cook food from raw ingredients we get some delicious food which is not as the ingredients whereas no new substances are formed in Physical changes such as cutting of wood.
(3) Physical changes are usually temporary whereas chemical changes are permanent.
BTW sir you are an awesome teacher you teach the subject of science the best in whole youtube
Thanku for your such a great help.and never stop from making such amazing videos.
Regards:
------- Naman Belwal ----------
No cheating 😡
Q1:
a) Boiling of water - Physical change
b) Rusting of iron - Chemical change
c) Respiration - Chemical change
d) Cutting of wood - Physical change
Q2:
Cooking of food is a chemical change. When food is cooked, chemical reactions occur, such as the Maillard reaction, which changes the composition and properties of the food, leading to the formation of new substances with different chemical compositions and properties.
Q3:
1. Physical changes do not involve the formation of new substances, while chemical changes do.
2. Physical changes usually involve changes in state or appearance, while chemical changes involve changes in chemical composition.
3. Physical changes are usually reversible by physical means (such as melting, freezing, or dissolving), while chemical changes are often irreversible or require specific chemical reactions to reverse.
q1 a physical change because we can bring it back to room temparature by cooling it so its reversible and no new substance is formed
b chemical change because rusting of iron is an irreversible change and a new substance 'rust" is formed
c respiration is a chemical change. Oxygen is taken during the respiration,the output should be also the oxygen in order to make it a physical change. ... That's why it is considered as a chemical reaction where the initial compound is oxygen and final compound is carbon dioxide.
dCutting of wood is a physical change because only physical property of wood is changed and no new substance is formed. the properties of wood remains the same.
Q2 Cooking of food is a chemical process since it involves changes in the chemical composition of food. Heating food at high temperature and adding additives such as oil, butter, baking powder etc results in the breaking down of chemical substances present in food and formation of new chemical substances.
Q3physical changes are reversible and no new substance is formed while chemical changes are irreversible and new substance is formed physical changes are temporary while chemical changes are permanant the mass of a substance which is reversible[physical changes] usually remains same mass of substance which is irreversible [chemical changes] usually changes
THANKS A LOT FOR HELPING ME LEARN VERY EASILY
ANSWER 1: a)PHYSICAL b)CHEMICAL c)CHEMICAL d)PHYSICAL
ANSWER 2: CHEMICAL CHANGE BECAUSE NEW SUBSTANCE IS FORMED AND IS IRREVERSIBLE.
ANSWER 3: PHYSICAL: NO NEW SUBSTANCE IS FORMED, REVERSIBLE, MASS OF SUBSTANCE DOESN'T CHANGE
CHEMICAL: NEW SUBSTANCE IS FORMED, IRREVERSIBLE, MASS OF SUBSTANCE CHANGES
Thank you
u saved my life ty
You are welcome
aryaman sahay thanks 😊 for the answers
Any one here in 2024
Yes😢
1:14
Yes 1:37
Yes 9:25
Yes
Who thinks that he should be in our school
👇👇
1.a)Physical change
b)Chemical change
c)Chemical change
d)Physical change
2.Cooking of Food is Chemical change because the energy increases,mass changes,new substance is formed and it is
irreversible.
3.Physical Change- Chemical Change-
i) No new substance is formed i)New substance is formed
ii)Reversible ii)Irreversible
iii)Temporary change iii)Permanent change
;Thank you for the useful video
Excellent!! All your answers are correct :) Great to hear that you found the video useful!
Q1
a- Physical change
b- Chemical change
c- Chemical change
d- Chemical change
Q2 Chemical change as a new substance is formed.
Q3 PHYSICAL CHANGE
No change of mass
No new substance is formed
It can be reversed
CHEMICAL CHANGE
Change of mass occurs
New substance is formed
It can't be reversed
Very good!! All your answers are correct except Q1 (d) will be physical change. Since when a log of wood is cut, it is broken into smaller pieces. No new substance is formed.
Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/chemistry/matter-in-our-surroundings/l/physical-and-chemical-changes
Both takes place
Legend's are seeing it after 5 years
🤟🤘Yes
Q1 a and d are the physical changes and the rest are the chemical changes
Q2 cooking of food in a chemical changes because when the food is cooked it cannot be changed back into its orignal state theta why it is a chemical changes
Q3 Physical changes
1 they are reversible
2 They are temporary
3 and there is no new substance is form
Chemical change is reverse than the physical changes
Q1: A: physical B: Chemical C:physical d:physical
Q2: Yes because you cant undo it. If you bake a pie , the pie/pizza/doughnut will always be cooked, you cant undo it. Q3: A chemical change can not be undone, a physical changes mass stays the same and , in a physical change the outside/shape/form can be different but the inside says the same
I know this is very unrelated but i love your channel
@@almondmilk1298 thank you! :)
Thank you because tomorrow is my exam 😀
Lol me too
Me too
Yes tommarow is my exam
Me too my exam will start
Lol not mee to
1.a)Physical Change
b)Chemical Change
c)Chemical Change
d)Irreeversible Physical Change
2. Yes, Cooking of food is a chemical change as a new substance is formed and the proccess cannot be reversed.
3.Chemical Change
•Irreversible
•New substance is formed
•Mass Changes (without gases counted)
Physical Change
•Usually Reversible
•No new Substances are formed
•Mass doesn't change
Thank you for well explained video!
Q1.
a,physical change
b,chemical change
c, chemical change
d,physical change
Q2.
It is a chemical change because new substance is formed.
Q3.
1.Physical changes are reversible.
1.Chemical changes are irreversible.
2.No new substance form in Physical changes.
2.new substance form in chemical changes
3.there is no change in mass during physical change.
3.there is change in mass during chemical change
This kind man will explain my class instead of my professor.
My professor is lame, he makes other people give class instead of him :(.
My sir is a moron ,who doesn't know how to teach!
Please explain the chapter water.
Question 1
a)Physical change since we only changing the phase of water,no new substances are formed
b)Chemical Change,rust is a new substance formed when iron reacts with oxygen
C)Chemical change since it is the breakdown of food consumed to produce energy,also because it is irreversable and there is large energy change
D)Physical change,no new substances formed since we only cutting the wood,we not burning to release energy in the air.It's still wood even though it's cutting
Question 2:
Chemical change,it is irreversable and there is large energy change(heat produced)
Question 3:
Physical change-No new substances formed,reversable,mass stays the same,small energy change
Chemical change-new substances formed,irreversable,mass changes,large energy change
I have a ques - How can we separate lemon and water as you said it is a physical change ??..
Thanks
He have not asked about lemon and water it's about sugar and water in which chemical properties are they same so hopes this helps you
@@eberybhadisaynoooo5604 thanks
Anyone here in 2056😊
Well are you in 2056? 💀💀💀
Yes I am
1.a) Physical change
1.b) Chemical change
1.c) Chemical change
1.d) Physical change
2. Chemical change. Because heat is being absorbed and produces a new component.
3. Physical change - mostly reversible, does not produce a new substance and temporary.
Chemical change - irreversible, produces a new substance and permanent.
Thank you so much!
Q1 Boiling of water and cutting of wood are physical changes. Rusting of iron and respiration are chemical changes.
Q2 Cooking of food is a chemical change because it forms new substances and you cannot reverse the food.
Q3 1.Physical changes form no new substances but a chemical change forms new substances.
2.Chemical changes are permanent but a physical change is temporary.
3. Chemical changes involve heat, light and electrical energy but physical changes do not
Question 1:
a) Physical change
b) Chemical change
c) Chemical change
d) Physical change
Question 2:
Cooking of food is a chemical change as it involves new substances being formed(cooked products, gases), energy (heat) being needed and it is an irreversible change.
Question 3:
Physical | Chemical
It is a reversible It is a irreversible
change. change.
New substances New substances
are not formed. are formed
No energy is being Energy is being
released or released or
absorbed absorbed
Ur explanation is really amazing its really helpful in this quarantine
Glad you think so!
@@ManochaAcademy you're fantastic
answers:-
q1- a physical change
b- chemical change
c- chemical change
d- physical change
Q1:
A.) Physical Change
B.) Chemical Change
C.) Chemical Change
D.) Physical Change
Q2:
Cooking of foods is a chemical change because after cooking there is a new substance formed, and it is irreversible.
Q3:
In chemical change there is/are new substance formed, it's irreversible, and the mass of a substance change. While in physical change there is no new substance formed, it's reversible, and the mass of a substance remains the same.
JHENNICA JOY C. GARCIA
8-K
Q 1. a)physical change
b)chemical change
c)chemical change
d)physical change
Q 2. Cooking is a chemical change because when we cook the raw vegetables , cereals ,etc. then we get a new substance with new properties with a different taste and colour which can't be reversed. For example, if we make a potato fry then, the raw potato is very much different from the cooked one. It also tastes and smells different from the raw one. Thus, from this we can make out that cooking is a chemical change.
Q 3. The three difference between chemical and physical change is that, chemical change are irreversible but physical changes are reversible, a new substance is formed in chemical change but no new substance is formed in a physical change and the energy change is large in chemical change but in a physical change it is small.
Sir your teaching is very nice
Thanks and welcome
Much love from 🇦🇪 UAE
Welcome. Greetings from India
I am also from India 😋😋
I'm from India too 😃
@@ManochaAcademy i am pro in pubg
Q1 a) physical change
b)chemical change
c)chemical change
d) physical change
Q2 Cooking of food is a chemical change because new substances are formed.
Q3 physical changes:
No new substances are formed
Are reversible
Mass doesnt change
Chemical changes : just the opposite
Ans 1
a. Physical change
b. Chemical change
c. Chemical change
d. Physical change
Ans 2
Chemical change because once we cook the food new substance are formed and are irreversible
Ans 3
Physical change
Changes which are temporary
Changes which are reversible
No new substance are formed.
Chemical change
Changes which are permanent
Changes which are irreversible
New substance are formed.
ty
The best day was when I found this channel by mistake..
Great
Yaa me too😂😂😂
Same
O really??
Me too
1 is both physical and chemical
A:-1.a) Physical change
b) Chemical change
c) Chemical change
d) Physical change
A:-2. Cooking of food is a chemical change because it is a new substance that is formed and it is also irreversible.
A:-3. Chemical change - I) new substance is formed II) irreversible III) Mass will change.
Physical change - I) no new substance is formed II) reverseble III) Mass will not change.
Q1
A) Physical change.
B) Chemical change
C) Chemical change
D) Physical change
Q2= Cooking of food is chemical change because a new substance is formed .
Q3
Physical change
1. In a physical change no change of substance.
2.Reversible.
3.The mass stays the same.
Chemical change
1.A new substance formed.
2.Irreversible.
3.Mass changes.
Never ever seen this type of teaching excellent👍👍.
Glad to hear that
Because of this I perfect my exam
Glad to hear that
Me to
Me too
when class is you teach
Boiling of water- physical change ,rusting of iron- chemical change ,respiration - chemical change, cutting of wood- physical change
Nerd
2030 anyone? 💀👍
Kal ut hai mera bro
Q1 A=physical change
B=chemical change
C=chemical change
D=physical change
Manocha Academy channel is very great
Thanks
Q no.1) Option-D
Q no.2) Chemical change
Q no.3) Freezing of water, melting of wax, boiling of water, etc...
But sir ,there are reversible chemical reactions,so can we say that chemicals changes are reversible and irreversible??
I got an iPad because of your great grade you give me!
Damn that's cool
Bro parents be rich
wait i forgot i even wrote this 😪
Sir is cooking a food a chemical or a physical change?
RAS
Chemical
1.
boiling of water is a physical change
rusting of iron is a chemical change
respiration is a chemical change
cutting of wood is a physical change
2.
Yes, because the mixing of ingredients form new substances.
3.
physical change does not form any new substances, change in the state of matter, mass of the substance does not change
chemical change does form new substances, reacts, mass of the substance usually changes
Physical changes:
Boiling of water.
Cutting of wood.
Chemical changes:
Respiration.
Rusting of iron.
Cooking of food is a chemical change because
1.it is irreversible.
2.a lot of energy is produced.
3. A new substance is formed.
Physical changes:
No new substance is formed.
It is reversible.
Little energy is produced.
Chemical changes:
Me substances are formed.
It is irreversible.
Lot of energy is produced.
very clear and enjoyable
Glad you liked it
1) a] PHYSICAL CHANGE , b]CHEMICAL CHANGE , c] CHEMICAL CHANGE , d] PHYSICAL CHANGE
2) COOKING OF FOOD IS CHEMICAL CHANGE AS A COMPLETELY NEW SUBSTANCE IS FORMED FROM THE RAW MATERIALS, AND IT IS IRREVERSIBLE
👍👍
Q.1 physical changes: boiling of water & cutting of wood
Chemical changes: respiration & rusting of iron
boiling of water and cutting of wood is physical change rusting of iron and respiration is chemical change
Cooking of food is a chemical change as it involves the change in the composition of thefood. After cooking, the raw ingredients of the vegetables cannot be regained.
change affects only physical properties i.e. shape, size, etc. Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc
I love this video so much.
Great !
the dislikes are the science teachers that cant explain it as well as u did
Sooo true
That’s not good if u don’t like it then you keep to ur self
Xd
Our science mam showed us this video lol.
@Juelz Mohamed oh no
Q1
a) P
b) C
c) P
d) C
Q2
Chemical
11:38
Q1
a- physical change
b- chemical change
c- chemical change
d- physical change
Q2- It's a chemical change because the new substances that are formed cannot be made back to the raw food. Also their composition must have changed as the cells of the food are heated.
Q3- Difference one- new substances are formed in chemical change but not in physical change
Difference two- lot of energy is produced during chemical change but very less energy is produced during physical change.
Difference three- chemical changes are irreversible/permanent but most physical changes are reversible (there are exceptions too).
Q1.a) physical change
b)chemical change
c) chemical change
d) physical change
Q2. Cooking is chemical change as we cannot change a cooked food to raw.
Q3. 1.Chemical change
A.irreversible
B. new substance is formed
C. Mass does not remains same
2.Physical change
A.reversible
B. No new substance is formed
C. Mass remains same.
Question 1. Physical changes
Physical
b)chemical change
c)chemical change
d)physical change
Question 2. Cooking raw vegetables, cereals, etc. produces a new substance with a different taste and colour that cannot be reversed. The raw and cooked potato differ significantly in a potato fry, for example. Furthermore, the raw one has a different taste and smell. Cooking is the result of a chemical change, as we can see from this.
Q 3. There are three major differences between chemical and physical change: Chemical changes are irreversible while physical changes are reversible; Chemical changes create new substances while physical changes do not; and Chemical changes generate large energy changes while physical changes are relatively small.
Show less
Q1: (A) because he is still liquid but heated so physical and chemical changes Q2: it's chemical change because if you cook it, it produce gas and its state Q3: Physical change:the weight of substance doesn't change, temporarily change which can reverse,No new substance is formed. Chemical change: changing color,produce bubbles, irreversible. This is my answer thank you for teaching us
Q1 Ans -
A. Physical
B. Chemical
C. Physical
D. Chemical
Q2 It's chemical change because the new substance are formed.
Q3. Physical change -
1. Reversible
2. No new substance is form.
3. Doesn't change its mass
1st answer:a)boiling of water is physical change,b)rusting of iron is physical change,c)respiration is chemical change and d)cutting of wood is physical change.
2nd answer: Cooking of food is a chemical change because the our food changed after cooking.It's condition is changed after cooking from the condition of food before.
3rd answer:Physical changes Chemical changes
1)is temporary 1)is permanent
2)does not change its mass 2)changes its mass
3)no new substance is formed 3)new substance is formed
👍👍
I love your videos and yours only because I understand better with you only
So glad to know. Keep watching and do share with your friends.
1.candle:chemical change
2.lemon:chemical change
3.sugar grinding:chemical change
4.melting of ice:chemical change
mixing of sugar lemon & water:chemical change
A) boiling of water is physical
B) rusting of iron is chemical
C) respiration is chemical
D) cutting of wood is physical
Q2 Cooking of food is chemical due to the evidence new substances are formed also it is irreversible and the mass is also changing
Q3 Chemical changes are irreversible, the mass usually change and new substances are formed
While in physical changes no new substances formed, it is reversible and the mass does not change
Sir you explain so nicely. 😀😀
Thanks a lot 😊
I like your channel than other channels. You teach very good and do not teach very fast or very slow. I hope that you will make more videos. All the best for future and keep making such videos. Thank you
Thank you, I will
@@ManochaAcademy thanku you sir you are sooooo amazing outstanding teaching style
Ans 3 -
1) No new substances will form in physical change but in chemical change new substances will form.
2) In physical change, the mass will be same only but in chemical change, the mass will become less.
3) In physical change, the change will be usually reversible but in chemical change, the change will be irreversible only.
1. Boiling of water is physical change.
B. Rusting of iron is chemical change.
C . Cutting of wood is physical change.
ANSWERS...
Q1.a. physical change
b. chemical change
c.chemical change
d. physical change
Q.2 Physical
Q.3. CHEMICAL CHANGE - New substance formed , irreversable
PHYSICAL CHANGE - No new substance formed , reversible
whatsssssssssss
he said 3 differences
@@nospaceforsadness816 hlo what you mean...
hlo
any one
but said only to write 2 of themmm
Thank you sir for easy and convenient explanation of physical change and chemical change
You're most welcome
Yes sir very much , Thankfull to you 🌹🌹
Q1; Bioling of water,respiration,(cutting of wood are physical changes can be reversible)
Rusting of iron is a chemical change
Q2;Cooking of food is chemical change Q3; CODE:New substances in a chemical change makes mass changes and irrereversible(permenant) and energy changes large other wise physical change .
Same answer bro
Respiration is a chemical change, when we inspire o2, it reacts with glucose in cells, to give out co2 and h20. Hence chemical change since new substance is being formed.
no.1 cocking is a chemical change because once cooked can't return to the raw form
Thank you sir for helping me I currently have a upcoming paper during this quarintine so basically you have became my substitute teacher.
It's my pleasure
You are good sir Because you teach like funny that why we love to see your video
Keep watching
I wish I could be your daughter so I can learn more from you or so intelligent like you......I understood better than my school teachers thankyou so much sir
Most welcome
Q10 Ans -
A. Physical
B. Chemical
C. Physical
D. Chemical
Q2 It's chemical change because the new substance are formed.
Q3. Physical change -
1. Reversible
2. No new substance is form.
3. Doesn't change its mass
Chemical changes -
1. Irreversible
2. New substance forms
3. Changes its mass
Question 1:
A.)Physical Change B.)Chemical Change C.)Chemical Change D.)Physical Change
Question 2:
Cooking food is a chemical change because of the mass changes, irreversible, and energy increases, and a new substance is formed.
Question 3:
In a physical change, no new substance is formed, is reversible, and the energy decreases. In a chemical change, a new substance is created. What you have made is irreversible, and the energy increases.
Please get back to me sir. I am learning about this in class right now. Thank you
P.S. I honestly don't know if I can survive Math class and Science class without you. Thank you once again.
Excellent!! All your answers are correct :) Happy to hear that you liked the video!
Sir please make a class on Trigonometry
Q1.a.physical change
b.Chemical change
c.Physical change
d.Physical change
Answers:
Q1) a. Physical change
b. Chemical change
c. Chemical change
d. Physical change
Q2) Cooking of food is obviously, a chemical change since the raw vegetables when cooked cannot be reversed back into raw vegetables hence, cooked food / vegetables are completely new substances from the raw vegetables or we can take example as chapati, raw wheat chapati is completely different from cooked chapati hence we can say that cooked chapati is a new substance because it cannot be reversed back into raw chapati.
Q3) i. In physical change no new substance is formed whereas in chemical change new substance is formed with new properties.
ii. The changes can be reversed in physical change but not in chemical change.
iii. The mass of the substance after a physical change and before it remains the same but, in case of chemical change the mass of the substances generally changes but if we compare the total mass of the reactant side and total mass of product side it remains the same.
It helped me a lot Video thanks🤘😊😊
Great to hear that the video was helpful! Do check out more videos at www.manochaacademy.com
Q1. Physical changes; Boiling of water and cutting of wood.
Chemical changes; Rusting of iron and respiration.
Q2. Chemical change, bcuz new substance is formed and the food is irreversible.
Q3. Physical changes; No new substance is formed but chemical change, new substance is formed.
Physical changes, reversible but, chemical change, irreversible.
Chemical change, mass of substance usually change but, physical changes, mass substance remain the same.
1 a physical change
B chemical
C chemical change
D physical change
2 cooking of food is a chemical change as it is the finished result of a bunch of ingredients mixed with each other and put under sudden temperature changes. All of this helps the ingredients react with each other to the point that we get something that tastes completely different than the raw materials.
3 ! Physical changes are usually reversable whereas chemical changes are not.
! Physical change can change the shape or size of the substances whereas chemical changes are the combination or result of two or more atoms (changes chemical properties
! New substances are formed in chemical changes whereas new substances aren't formed in physical vhanges
Que 1.
a) physical change
b) chemical change
c) physical change
d) chemical change
Que 2.
cooking of food is a chemical change because earlier they were raw material but after cooking it become cooked food..
Que 3.
physical change : no new substance is formed
chemical change : new substance is formed
physical change: reversible
chemical change : irreversible
physical change : mass remain constant
chemical change : difference in masses
Pls upload videos that gives basic idea abt atoms molecules elements etc
Q1.a Physical change
b.chemical change
c.chemical change
d.physical change
Q2.It is a chemical change because a new substance is formed.
Q3.1.Physical change
physical change is reversible
2.no new substance is formed
3.the weight of a substance remains the same even though the state changes
Chemical change
1.It is irreversible
2.new substance is formed
3.the weight of a substance changes
1a. Physical change
b. Chemical change
c. Physical change
d. Chemical change
2. Cooking is a chemical change because, the cooked food can not be reversed back 'raw'
3. The three differences blw physical and chemical changes are;
a. Physical change can be reversed
b. Physical change maintain its mass as d same
c. New substance are formed. While
A. Chemical change can't be reversed
b. No new substance formed
c. Differs in masses
In chemical change new substances are formed! Basically changes occur in chemical composition.
Q1. a) physical change
b) chemical change
c) chemical change
d) chemical change
Q2. chemical change, because there would be a change of mass,new substances are formed and irreversible.
Q3. Physical change=1)no new substances are formed.2) reversible
3)energy change are small
Chemical change=1)new substances are formed
2) irreversible
3) energy change are large.
D) cutting of wood is physical change
Q1
A) physical change
B) chemical change
C) chemical change
D) physical change
Q2
Cooking of food is a chemical change
Because new substance is formed
And is irreversible
Q3
Physical change
No new substance is formed
It is reversible
It is temporary
Chemical change
New substance is formed
It is irreversible
It is permanent.
Thank you sir it had help me a lot to learn
the raw sugar is converted into powder sugar so it is not a reversible so it is a chemical change
For chemical change new substance has to be formed. Since no new substance is formed it is a physical change. Even though it is irreversible.
actually you are able to boil and strain the water therefor it is reversible
@@ManochaAcademy ohh ok
Ans 1 a) boiling of water and d) cutting of wood is physical change..and b) rusting of iron and c) respiration is chemical change.
Ans 2 Cooking of food is physical change because after we cook and dish like pulses (dal) after it cooked we can't reverse it.
Better then my tution teacher.
Sir u explain good
Thanks for liking