A technique which is used to desalinate water, is

Balloons are filled with

A technique which is used to separate and identify the different constituents of mixture is called

Air is a mixture of

A separation technique which uses fractionating column to separate different liquid components in a mixture with different boiling points by heating the mixture is called

Nitrogen helps in preparation of nitrogen based

For purification water is passed through

The percentage of noble gases in air is

When salt is mixed into water it becomes

Alloys include

The point at which solid substance changes into liquid state, is called

The techniques which help to separate mixtures, involve

In clean air, percentage of oxygen is