The component of the air among the following which has the highest boiling point is

The first definition for ‘element’ is given by

Coloured gem stone is an example of …

Ink is mixture of … in water.

The term element is first used by ……

Percentage of oxygen in air by volume …

Percentage of nitrogen in air by volume ……

Percentage of argon in air by volume

Components of blood sample are separated by …

Naphthalene in water separated by …

Petrochemicals are separated by …

Milk, butter, cheese, cream, gel, boot polish These are

‘Churning makes the lighter components to come to the surface when a mixture of liquids are spun rapidly’. This principle is used in

Generally solid solutions are available in

80 ml of solution contains 20 gr of solute. The mass by volume percentage of the solution is