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
Hii I am your new subscriber! Now The Answers of your questions are -: Q. 1 - a) boiling of water - physical change b) rusting of iron - chemical change c) respiration - chemical change. d) cutting of wood - physical change Q. 2 cooking of food is a chemical change because the raw food turns into ripen food and a new substance is formed and it does not go to it's ripen food state. Q. 3 physical change - 1. No new substances are formed. 2. Energy change small 3. Mass of substance remains same. 2. Chemical change - 1.New substances are formed. 2. Energy change large 3. Mass of substance changes. So here are my answers. Thanks. 😊
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
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!
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
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.
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.
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 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
Boiling water - Physical change Rusting - Chemical change Respiration -Chemical Cutting of Wood- physical Thank you so much Sir for this wonderful lecture
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
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.
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
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.
11:37 1 :- a)boiling of water : chemical change b) rusting of iron : chemical change c) physical change d) chemical change 2 :- Chemical change because we could not get the raw substance back. 3 :- Physical changes (i) In physical change no new substance is formed. (ii) This change is reversible. (iii) mass of the substance is not changed. Chemical change (i) A new substance is formed (ii) This change is irriversible (iii) Mass of the object is changed.
Boiling of water is a physical change....Though water and steam look different, they are both made of H2O molecules. No new substance is formed during the boiling of water.
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
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
Q1 ans: a=physical change , b=chemical change, c=chemical change,d=physical change Q2 ans: Cooking of food is a chemical change as a new substance is formed. Q3 ans: 1)physical change is reversible chemical change is irrreversible. 2)no new substance is formed after a physical change and new substances are formed after a chemical change. 3)The mass of a substance before and after a physical change is same but the mass of substance after a chemical change may or may not be same. Another great video sir.. Thankyou.
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
hello sir. Just found ur video . Amazing time learning with you . Just a few doubts. 1. Give reasons why : a) the smell of hot sizzling food reaches you several meters away but to get the smell of cold food you gave to go close to it. b) a crystal of iodine on slow heating in a cold flask turns into vapour and fills the entire room. 2. One exmple of : a) an irreversible exothermic change. b) an undesirable endothermic change. i please u answer asap 😊
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
Q1 a)physical change b)chemical change c)chemical change d)physical change Q2 Chemical change because it requires much energy and new substances are formed Q3 Physical change ●No new substance formed ●requires less energy ●No change in mass Chemical change ●new substance formed ●large amount of energy is required ●there's change in mass Please🙏 let me know if I did correctly or not??? And your video is useful and helpful.....Thank you
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 .
1.a)physical change b)chemical change c)chemical change d)physical change 2.chemical change b/c in chemical change formed a new substance e.g:-when we cook we add ingredients .'. we can't irreversible that. 3.chemical change formed new substance it is irreversible but in physical change no new substance formed and it is reversible thank you for teaching
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
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
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
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
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.
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.
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
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
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
Today was my Science final exam and I checked my paper with my friends and I got to know that I only got one question wrong from the chapter speed and motion, the question was of 2marks so I got 78/80marks as per me, I will wait for the final results
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
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
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
Hi, sir can you make a video on the different types of chemical changes: 1. Decomposition 2. Combination 3.Crystalization, and how we get salt from the oceans
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
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
1A.physical B.physical C.chemical D.chemical 2.chemical change it's beacuse it's irreversible 3.physical-no new substance is formed ,energy change and its reversible Chemical-new substances are formed,mass of substance usually change and its irreversible
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
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
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.
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.
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.
It’s a chemical change because when you add lemon/lemon juice to it, it tastes different and changes it into a new substance, a different substance from tea
@@ConquestDusk_ but the correct ans in my book is physical change.... That's why I am confused bro... Because when we add lemon only colour changes but tea remain tea... No new substance form.... Maybe this is the reason
For LIVE Classes, Concept Videos, Quizzes, Mock Tests & Revision Notes please see our Website/App
👉Our Website: bit.ly/2KBC0l1
👉Android App: bit.ly/3k48zdK
Thanks
Thank u fuc*er
😂😂😂😂@@chandrakumar6773
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 ,
@@gforcebhai1994Yes,cooking of food is physical and chemical change but in different ways
Hii I am your new subscriber! Now The Answers of your questions are -:
Q. 1 - a) boiling of water - physical change
b) rusting of iron - chemical change
c) respiration - chemical change.
d) cutting of wood - physical change
Q. 2 cooking of food is a chemical change because the raw food turns into ripen food and a new substance is formed and it does not go to it's ripen food state.
Q. 3 physical change - 1. No new substances are formed.
2. Energy change small
3. Mass of substance remains same.
2. Chemical change - 1.New substances are formed.
2. Energy change large
3. Mass of substance changes.
So here are my answers. Thanks. 😊
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
2:32 lemonmade tutorial
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!
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)*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
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.
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.
Great answer 👍
@@rasanyagummerla3270 utdxh
Ur explanation is really amazing its really helpful in this quarantine
Glad you think so!
@@ManochaAcademy you're fantastic
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 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! :)
Never ever seen this type of teaching excellent👍👍.
Glad to hear that
Boiling water - Physical change
Rusting - Chemical change
Respiration -Chemical
Cutting of Wood- physical
Thank you so much Sir for this wonderful lecture
Sir you explain so nicely. 😀😀
Thanks a lot 😊
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!
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
@@Penguin58 thanks
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
Much love from 🇦🇪 UAE
Welcome. Greetings from India
I am also from India 😋😋
I'm from India too 😃
@@ManochaAcademy i am pro in pubg
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.
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
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!
11:37
1 :- a)boiling of water : chemical change
b) rusting of iron : chemical change
c) physical change
d) chemical change
2 :- Chemical change because we could not get the raw substance back.
3 :- Physical changes
(i) In physical change no new substance is formed.
(ii) This change is reversible.
(iii) mass of the substance is not changed.
Chemical change
(i) A new substance is formed
(ii) This change is irriversible
(iii) Mass of the object is changed.
Boiling of water is a physical change....Though water and steam look different, they are both made of H2O molecules. No new substance is formed during the boiling of water.
Respiration is a chemical change .
Cutting of wood is a physical change.
Because of this I perfect my exam
Glad to hear that
Me to
Me too
when class is you teach
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
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
Sir your teaching is very nice
Thanks and welcome
Manocha Academy channel is very great
Thanks
Q1 ans: a=physical change , b=chemical change, c=chemical change,d=physical change
Q2 ans: Cooking of food is a chemical change as a new substance is formed.
Q3 ans: 1)physical change is reversible chemical change is irrreversible.
2)no new substance is formed after a physical change and new substances are formed after a chemical change.
3)The mass of a substance before and after a physical change is same but the mass of substance after a chemical change may or may not be same.
Another great video sir..
Thankyou.
The best day was when I found this channel by mistake..
Great
Yaa me too😂😂😂
Same
O really??
Me too
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!
hello sir. Just found ur video . Amazing time learning with you .
Just a few doubts.
1. Give reasons why :
a) the smell of hot sizzling food reaches you several meters away but to get the smell of cold food you gave to go close to it.
b) a crystal of iodine on slow heating in a cold flask turns into vapour and fills the entire room.
2. One exmple of :
a) an irreversible exothermic change.
b) an undesirable endothermic change.
i please u answer asap 😊
Thank you so much sir 🙏🙏🙏
Your teaching process by practically method is so amazing..❤️❤️❤️
Thanks and welcome
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
Q1
a)physical change
b)chemical change
c)chemical change
d)physical change
Q2
Chemical change because it requires much energy and new substances are formed
Q3
Physical change
●No new substance formed
●requires less energy
●No change in mass
Chemical change
●new substance formed
●large amount of energy is required
●there's change in mass
Please🙏 let me know if I did correctly or not???
And your video is useful and helpful.....Thank you
@Dr T VIJAYA SARADHI
S...o did I get them correctly
I guess you are correct. As my answers are also the same.
@@VishaAggarwal
Okay thanks
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 .
BEST WAY OF TEACHING. THANK Q SIR !!
🔥🔥🔥
Most welcome
oh what wait for a second!! Monocha Academy replied me .
1.a)physical change
b)chemical change
c)chemical change
d)physical change
2.chemical change b/c in chemical change formed a new substance e.g:-when we cook we add ingredients .'. we can't irreversible that.
3.chemical change formed new substance it is irreversible
but in physical change no new substance formed and it is reversible thank you for teaching
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 🌹🌹
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 😪
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
Sir wish u taught in my school ✨🛐🌸
Ur way of teaching is 🔥🔥🔥🔥🔥
Sir your way of explanation is amazing.
Thanks a ton
Q no.1) Option-D
Q no.2) Chemical change
Q no.3) Freezing of water, melting of wax, boiling of water, etc...
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
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
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
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!
Boiling of water- physical change ,rusting of iron- chemical change ,respiration - chemical change, cutting of wood- physical change
Nerd
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.
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
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. 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
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
I love this video so much.
Great !
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
What a brilliant Vid, i have a science test is 30 mins and this is going to help a lot!!!
Glad to hear
Tomarrow is my final exam and this video is helping a lot, once i get my marks i will let you know, by commenting again : )
Best of luck!
@@ManochaAcademy thanks
Today was my Science final exam and I checked my paper with my friends and I got to know that I only got one question wrong from the chapter speed and motion, the question was of 2marks so I got 78/80marks as per me, I will wait for the final results
Well illustrated and explained in a simple, slow paced,yet profound manner🤩👌and with examples and exercises...👨🏫👍..Thank you
You're very welcome!
you love teaching. It shows. :-) Great job! My 11 yr old had a confusion, after 12 mins, its clear. :-)
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
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
Thank you sir helped a lot best teacher of the universe🥀
It's my pleasure
Yeah
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
Sir, Super Explanation
Thank you Sir.
You are incredible 👍👍👍👍
Thanks
This video helped me to understand about physical and chemical changes
Thank you very much sir 🙂🙂💯
Glad to hear that keep watching and share with your friends
Hi, sir can you make a video on the different types of chemical changes: 1. Decomposition 2. Combination 3.Crystalization, and how we get salt from the oceans
This man has successfully achieved a higher power than any of my science teachers
We are thankful
You are welcome.
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
👍👍
A) physical change b;c;d are chemical changes & cooking of food is a chemical change & 3) mass ,new substance, absorption and release of energy
1 is both physical and chemical
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 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
sir you teach us very nice 👌👌👌👌👌👌👍
Thanks and welcome
very clear and enjoyable
Glad you liked it
Q.1 physical changes: boiling of water & cutting of wood
Chemical changes: respiration & rusting of iron
Thank you sir you are a great teacher 👩🏫 and my favorite channel
Thanks and welcome
But sir ,there are reversible chemical reactions,so can we say that chemicals changes are reversible and irreversible??
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
1A.physical
B.physical
C.chemical
D.chemical
2.chemical change it's beacuse it's irreversible
3.physical-no new substance is formed ,energy change and its reversible
Chemical-new substances are formed,mass of substance usually change and its irreversible
1d. physical change no new substance if formed
Sir is cooking a food a chemical or a physical change?
RAS
Chemical
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
Q1 A=physical change
B=chemical change
C=chemical change
D=physical change
You are the best science teacher for me. 👍
Happy to help
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
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
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.
Happy Teacher's day sir🧑🏫.You should really deserve an award sir👏👏🙂
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.
Better then my tution teacher.
Sir u explain good
Thanks for liking
1 a-physical
b-chemical
c-physical
d-chemical
2- Cooking food is a chemical change because it is irreversible
Sir please make a class on Trigonometry
Perfect teaching sir
Thanks and welcome
I found your channel by mistake
And I found that your videos are quite helpful to me
Thank you sir
Your video is amazing it helps me a lot thank you sir
Glad to hear that keep watching
Sir adding lemon to tea causing it's colour to change... Is it chemical or physical change...?? Pls reply 🙏
It’s a chemical change because when you add lemon/lemon juice to it, it tastes different and changes it into a new substance, a different substance from tea
@@ConquestDusk_ but the correct ans in my book is physical change.... That's why I am confused bro... Because when we add lemon only colour changes but tea remain tea... No new substance form.... Maybe this is the reason
You’ve got it all wrong bro, when you add lemon, the taste changes, that means that a new substance is formed
Which is a chemical change
@@raghav8114 when you add lemon the color changes and the taste, that means it’s a chemical change, a new substance is formed if the taste changed
I got a lot of help from your video. Our science teacher told class to watch your video, your video is very interesting for children.👍 Keep it up
Please explain the chapter water.
Please let's play blox fruit
Sorry