Which of the scheme is now discontinued, which was

When acid reacts with metal carbonate, _______ is/are formed.

The mine explosions are mostly caused by the combination of air with which gas?

Itai-Itai disease is caused by exposure to which metal?

Which of the following pollutants is the major contributor to photochemical smog?

Pepperonil, ethyl acetate, butyraldehyde and nitrate are some common adulterants used in ____________

Which substance is also known as 'Oil of Vitriol'?

Carbon-14 is produced in the Earth's atmosphere due to the interaction of nitrogen-14 with what type of rays?

Calcium cyanamide, used as a fertilizer, is commercially known as ______.

The combining power of an element is called its:

The first nuclear reactor made in India is named: