Where is the world's longest river?

The reaction between an acid and a base is called .....

Which is the staple food of majority of Indians?

In the photo, which type of bridge is shown?

What is the phenomenon of scattering of light in a colloidal solution known as?

What is the alloy of any element with mercury called?

What is the unit of electrical resistance?

Plaster of Paris is obtained by heating Gypsum at .......

The existence of a large numberof carbon atoms is due to ...

Which of the following is an allotrope of carbon?