What do you understand by chemical reaction ?

What do you understand by Bt.

What do you understand by ppm ?

What do you understand by gas?

What do you understand by COD?

What do you understand by a redox reaction ? Give an example.

What do you understand by rate of a reaction and specific reaction rate ? How the rate of a reaction can be determined ?

What do you understand by elimination reactions ? Discuss the mechanism of E_1 and E_2 reactions.

What do you understand by chemical equilibrium and how is it attained in a chemical reaction ? What are the characteristics of chemical equilibrium?

What do you understand by chemically similar elements ?

What do you understand by the term 'refraction of light'?