Who was the first female nominated member of the Rajya

Formation of ozone hole is maximum over

The element used for making solar cells is

The nucleus of an atom consists of-

______is the process in which acids and bases react to form salts and water

The most reactive among the halogens is-

Which one amongst the following is not a Green House gas?

An electric iron has a heating element made of:

The nucleus of an atom consists of-

The element used in the manufacture  of safety matches is —

Petroleum is a mixture of-