Water Pollution:-
The substance which are undesirable and cause contamination of the environmental is called……………..
a) ecosystem
b) pollution
c) dust particles
d) plastics
…………..pollution occurs when undesirable foreign substances are introduced into natural water.
a) Air
b) noise
c) water
d) none of these
Water is an excellent…………
a) solute
b) solvent
c) solution
d) suspension
Despite of mineral impurities, water of most ………… is for drinking.
a) lakes
b) rivers
c) springs
d) all of these
Common pollutants of water are……….
a) animals wastes
b) disease-producing organisms
c) toxic metals
d) all of these
