Ozone is formed naturally chemical reactions involving solar UV and…………molecules.
a) oxygen
b) carbon
c) hydrogen
d) sulphur
The formation of ozone occurs in…….steps.
a) 2
b) 3
c) 4
d) 5
The layer of
ozone gas protects us from the harmful UV of …………
a) Sun
b) planet
c) sky
d) earth
The decrease in the concentration of ozone in stratosphere below its natural level is termed as ozone …………
a) depletion
b) evaporation
c) condensation
d) sublimation
Ozone layer depletion refers to the………of ozone layer.
a) ticking
b) thinning
c) both a & b
d) none of these
