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Tag: what

chemistry 0

A Short intro to acid, base and indicators.

Acid base and salts Acids:-  these are the substances that Are sour in taste. Turn blue litmus red. Give H+ ions. Can accept a pair of electrons. Base :- These are the substances that Are bitter in taste. Turn red litmus blue. Soapy in touch. Give OH– ions. How to recognise the acid and bases? To answer this question lets […]

chemistry 0

Basics of chemical reactions and chemical equations.

Chemical Change The change which give rise to new substances with new properties that are totally different from the starting matter. 2H2 + O2     ———> 2H2O Chemical changes are normally accompanied by the following changes:- 1. change in state 2. Change in colour 3. Change in temprature 4. Evolution of gas Chemical reaction Representation of a chemical change in […]

chemistry 0

What is the difference between stereoisomers, optical isomers and enantiomers?

Stereoisomers:- these are the compounds that have same molecular formula but different arrangement of atoms in the space. Optical isomers:- the compunds that have same molecular formula but they rotate the plane polarised light to the different side, right side-dextrorotatory and left levorotatory. Enantiomer:- these are the compounds that are mirror images of each other and if they are present […]