Body of water coolers used in our house is made of iron which is

Which method is used to extract salts dissolved in sea water?

Burning of magnesium ribbons in presence of oxygen(air) is an example of  reaction like

The symbol Hg stands for

Impure substances are commonly called:

A chemical change is always.

A substance which is made up of only one kind of atoms is called

The exposed surface of sliced brinjal turns:

What is called blue vitriol?

Which of the following combine to form water molecules?