Відео

The curved arrows in the explanation of chemical reactions in chemistry are used to show the movement of the species bearing lone pairs of electrons or negative charges towards the electron deficient sites or positive charges to bind to form bonds.

This is about the information for writing a literature Review for a thesis or writing a review paper for beginners.

Mechanism of action of phenolphthalein as an indicator.

3,3',5,'-Tetramethyl Benzidine is very good substrate, which can be oxidized by hydrogen peroxide or different oxides or different nanoparticles and get light blue color. Now any reducing compound may be of animal origin or plant origin can be detected by adding to it and then noting the decrease in blue color or termination of blue color. By the application of this assay, many tests can be ach...

This rearrangement is [5,5] sigmatropic and Intra-molecular Rearrangement. No cross-over product is to be formed by mixing un-substituted Benzidine and substituted Benzidine.

Vitamin-C also called ascorbic acid. It is water soluble vitamin. It has several benefits relating to the the health of our body. As our body cannot form vitamin-C, so it is essential to get this from our diet and food. There are many vegetables and fruits, which are the good source of this vitamin. If we include them in our diet, then we can keep our health needs, which based upon the requirem...

Preparation of a good Poster or an Oral presentation of your research work for a scientific conference is an art and skill. It is essential to learn much about this work. Poster like publication/thesis, contains several sections and only difference is of writing a brief in poster/oral presentation as compared to publication or thesis. Here many good things have been mentioned and explained for ...

Vitamin C also called ascorbic acid, is water soluble vitamin. It is essential for several needs of our body to maintain our health and fitness. We require this vitamin for the absorption of iron in our body, which then prevent against anemia. This vitamin protects us against high blood pressure, dementia, gout, scurvy, skin diseases, gums and teeth diseases and so may more. It maintain the imm...

LDLs also called Low Density Lipoproteins are denoted as bad cholesterol. Increase in he concentrations of LDLs cause plaque formation on the inner sides of the walls of blood vessels and thus narrow them, which cause difficulty in the flow of blood. This narrowing of arteries termed as atherosclerosis and it is the cause of diseases like Heart attack and Brain stroke and many other diseases. L...

Retrosynthesis also called backward synthesis and is very important for analysis of target molecule to get the information about the connecting units (synthons). The Retrosynthesis would help to find the possible routes of the reactions may be natural or laboratory based. The deep study about retro is helpful for the researchers to do innovations for getting more effective and more worthy molec...

MCQs are backbone of assessment of learning outcomes of the students or candidates of any level. Construction of good and strong MCQs is an art and their are some principles for writing them. Construction of a good MCQ is a reflection of the efficiency of a constructor. A MCQ which is rightly constructed for a due assessment of candidate is always of a great worth. For writing the good MCQs one...

In this lesson, facts about the formation of an electrovalent or ionic bond are mentioned. Ionic bonds are to be formed between metal atoms and non-metal atoms. It is because that electrons can be transferred from metal atoms to atoms of non-metals, which are more electronegative. Loss and gain of electrons make ve and -ve ions, which are held together to form ionic bonds.

The Octet Rule is very important to understand about Valency, number of bonds formed by any atom of element and the nature of chemical reactions. Its an important guiding rule for knowing about the valencies of atoms of elements.

Wolf-Kishner Reduction occurs in presence of hydrazine and a strong base at an elevated temperature of about 200 C. In this reduction process, the carbonyl group (C=O) is converted into -CH2 group and as a result, ketones and aldehydes are to be converted to their corresponding alkanes, for example, acetone converted to propane etc.

Clemmensen Reduction

Birch Reduction Mechanism

Flame Test for analysis of metal ions in salts

Electronic Configuration on basis of Aufbau's principle

Finding the Purity of Fresh Milk by Lactometer

Conformations in Organic Molecules

Oxidation Half Reactions

Oxidation Numbers of Atoms in molecules/Ions

Electronic Configuration of atoms of elements.

Determination of Shapes of Molecules

Applications of Resonance Effect

Periodic Table of the Elements.

Variable Valency

RS and EZ Configuration

Optical Activity in Organic molecules