Aldehydes are produced in the atmosphere by:

Which of the following causes the depletion of the ozone layer in the stratosphere?

Which of the following statements is $NOT$ correct regarding tannins?

Which of the following gases causes the depletion of the ozone layer in the upper atmosphere?

When plants and animals decay,the organic nitrogen is converted into inorganic nitrogen. The inorganic nitrogen is in the form of

Formation of photochemical smog involves the following reactions in which $A$,$B$,and $C$ are respectively:
$(i)$ $NO_2 \stackrel{h\nu}{\longrightarrow} A + B$
$(ii)$ $B + O_2 \rightarrow C$
$(iii)$ $A + C \rightarrow NO_2 + O_2$
Choose the correct answer from the options given below: