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Match List $I$ with List $II$
| List $I$ | List $II$ |
| $A$ Nitrogen oxides in air | $I$ Eutrophication |
| $B$ Methane in air | $II$ $pH$ of rain water becomes $5.6$. |
| $C$ Carbon dioxide | $III$ Global warming |
| $D$ Phosphate fertilisers in water | $IV$ Acid rain |
Choose the correct answer from the options given below :
$A-IV, B-III, C-II, D-I$
$A-II, B-III, C-I, D-IV$
$A-I, B-II, C-III, D-IV$
$A-IV, B-II, C-III, D-I$
Solution
$i.$ $4 NO _2( g )+ O _2( g )+2 H _2 O (\ell) \rightarrow 4 HNO _3( aq )$
$SO _2$ \& $NO _2$ have major contribution in acid rain
$ii.$ $CO _2, CH _4, O _3, CFC$ are responsible for global warming
$iii.$
$H _2 O (\ell)+ CO _2( g ) \rightleftharpoons H _2 CO _3 \text { (aq.) }$
$\left. H _2 CO _3 \text { (aq.) } \rightleftharpoons H ^{+} \text {(aq. }\right)+ HCo _3^{-} \text {(aq.) }$
Rain water has $pH$ of 5.6 due to the Presence of $H ^{+}$ions formed by the reaction of rain water with $CO _2$
$iv.$ Phosphates present in fertilizers contribution for Eutrophication (Process in which nutrient enriched water bodies support a dense plant population, which kills animal life by depriving it of oxygen and results in subsequent loss of biodiversity is known as Eutrophication.)
