In the following picture…………techniques is being applied for
separation of acetone from water. NTS CT 25/08/2019 (8:30)
a) Sublimation
b) Distillation
c) Filtration
d) Evaporation
Drinking water sources can be contaminated by:
a) natural material
b) run-off from field and roads
c) forest
d) mountains
What percentage of the Earth’s water supply is fresh water?
a) 3%
b) 5%
c) 10%
d) 15%
We can get the purest form of water:
a) by boiling water
b) by distillation process
c) from tube-wells
d) from rivers
Heavy mechanical complexes use a large amount of water for:
a) cooling
b) freezing
c) washing
d) wasting
Which one is not the source of water pollution
a) human wastes
b) industrial wastes
c) fertilizers
d) rain water
