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(D) The photochemical smog formation involves the following steps:$(i)$ $NO_{2(g)} \stackrel{h
u}{\longrightarrow} NO_{(g)} + O_{(g)}$Comparing this

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$NO$,$O$ and $O_3$

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(D) The photochemical smog formation involves the following steps:$(i)$ $NO_{2(g)} \stackrel{h
u}{\longrightarrow} NO_{(g)} + O_{(g)}$Comparing this with $NO_2 \stackrel{h
u}{\longrightarrow} A + B$,we get $A = NO$ and $B = O$.$(ii)$ $O_{(g)} + O_{2(g)} ightarrow O_{3(g)}$Comparing this with $B + O_2 ightarrow C$,we get $C = O_3$.$(iii)$ $NO_{(g)} + O_{3(g)} ightarrow NO_{2(g)} + O_{2(g)}$This confirms $A = NO$,$B = O$,and $C = O_3$.Thus,the correct answer is $D$.

Column-$I$	Column-$II$
$(A)$ Acid rain	$(1)$ $CHCl_2-CHF_2$
$(B)$ Photochemical smog	$(2)$ $CO$
$(C)$ Combination with hemoglobin	$(3)$ $CO_2$
$(D)$ Depletion of ozone layer	$(4)$ $SO_2$
	$(5)$ Unsaturated hydrocarbons

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:

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Column-$I$ Column-$II$

$(A)$ Acid rain $(1)$ $CHCl_2-CHF_2$

$(B)$ Photochemical smog $(2)$ $CO$

$(C)$ Combination with hemoglobin $(3)$ $CO_2$

$(D)$ Depletion of ozone layer $(4)$ $SO_2$

$(5)$ Unsaturated hydrocarbons

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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: