distillation
sublimation
precipitation
evaporation
Correct answer is B
Sublimation is the transformation of solid gaseous state without passing through the liquid state. Options A,C,D do not show case these character of sublimation as they do not bye pass states. They are in a particular order
The acid in electrolysis of water is dilute
HNO3
CH3COOH
H2SO4
HCl
Correct answer is C
HeSO4 is the acid used in the electrolysis of water. Option A,B,D are concentrated acid and they will react with the water
Vulcanization involve the removal of
monometer
the single bond
the double bond
a polymer
Correct answer is C
Vulcanizer is the removal of double bend in a chemical reaction. Option A,B,D can not be removed by vulcanizer
The gas that is most useful in protecting humans against solar marathon is
chlorine
ozone
carbon IV oxide
hydrogen sulphide
Correct answer is B
The ozone layer or ozone shield refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It contains high concentrations of ozone (O3) relative to other parts of the atmosphere, although still very small relative to other gases in the stratosphere
In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by
washing under pressure
drying over phosphorus (V) oxide
passing the mixture to the limewater
using ammonical copper (I) chlorine
Correct answer is A
Washing under pressure is an action in the industrial production of H. Options B,C,D will not yield Co and H