When salt is mixed into water it becomes

Alloys include

A. steel

B. brass

C. bronze

D. all of them

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

A. melting point

B. boiling point

C. power point

D. complex point

The techniques which help to separate mixtures, involve

A. filtration

B. distillation

C. chromatography

D. all of them

In clean air, percentage of oxygen is

A. 0.07

B. 0.1

C. 0.15

D. 0.17

A technique which is used to desalinate water, is

A. reverse osmosis

B. distillation

C. filtration

D. heating