Which of the following statements is correct?

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(C) The correct answer is that the ozone hole is the thinning of the ozone layer in the stratosphere at some places.It is not a literal hole,but a sig

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Ozone hole is thinning of ozone layer of stratosphere at some places.

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(C) The correct answer is that the ozone hole is the thinning of the ozone layer in the stratosphere at some places.It is not a literal hole,but a significant reduction in the concentration of ozone $(O_3)$ in the stratosphere.The depletion is primarily caused by compounds like $NO_x$ and $CFCs$ (Chlorofluorocarbons).The chemical reactions involved are:$NO_2 + O_3 \rightarrow NO_3 + O_2$$CF_2Cl_2 \rightarrow CF_2Cl + Cl$$\dot{Cl} + O_3 \rightarrow Cl\dot{O} + O_2$$Cl\dot{O} + O \rightarrow \dot{Cl} + O_2$These reactions occur in the stratosphere.

List-$I$	List-$II$
$A$. Bleaching of paper	$I$. $CF_2Cl_2$
$B$. Eye irritant	$II$. $H_2O_2$
$C$. Freons	$III$. $Na_2AsO_3$
$D$. Herbicide	$IV$. $PAN$
	$V$. $CO_2$

Similar Questions

Match the items in List-$I$ with the items in List-$II$ and select the correct answer from the given options:
List-$I$ List-$II$
$A$. Bleaching of paper $I$. $CF_2Cl_2$
$B$. Eye irritant $II$. $H_2O_2$
$C$. Freons $III$. $Na_2AsO_3$
$D$. Herbicide $IV$. $PAN$
$V$. $CO_2$

The presence of which of the following is the best indicator of incomplete combustion of petrol or diesel in an automobile engine?

The normal rain water is slightly acidic and its $pH$ value is $5.6$ because of which one of the following?

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:

Some gases are responsible for the heating of the atmosphere (greenhouse effect). Identify from the following the gaseous species which does not cause it.

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