Most abundant element is oxygen within the…
a) Earth crust
b) Moon
c) Mars
d) None of them
Major use of nitrogen is production of ……
a) Acid
b) Ammonia
c) Nitrate
d) sulphate
Other than nitrogen and oxygen, composition of rest of gases is about……
a) 4%
b) 3%
c) 2%
d) 1%
As temperature of air increases, there is an increase in capacity
of …….
a) Mineral
b) Water vapor
c) Molecules
d) Atom
Water vapor is less dense than ……………
a) Temperature
b) air
c) Dust
d) Space
Moisture capacity of air is called ………
NTS PST 24/11/2019 (2:30)
a) Vapors
b) Humidity
c) Moist
d) Wet air
