What will come in place of the question mark (?) in the

What happens when camphor is heated?  

The pH of a neutral solution is —

The function of quick lime in soda lime mixture is to

The first nuclear reactor made in India is named:

Which gas is most abundant in the Earth's atmosphere?

Which statement is NOT correct regarding Zinc-ion batteries?

Potassium Permanganate is used for purifying drinking water, because it – 

Which gas is primarily used in the filling of incandescent light bulbs?

Which of the following is NOT a physical change?

Identify the pairing that is not correctly matched.

  (I) Dry ice - Solid form of carbon dioxide