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| List-$I$ | List-$II$ |
|---|---|
| $(a)$ $2 SO_{2(g)} + O_{2(g)} \rightarrow 2 SO_{3(g)}$ | $(i)$ अम्ल वर्षा |
| $(b)$ $HOCl_{(g)} \stackrel{h \nu}{\longrightarrow} \dot{O}H + \dot{Cl}$ | $(ii)$ धूमकोहरा (Smog) |
| $(c)$ $CaCO_{3} + H_{2}SO_{4} \rightarrow CaSO_{4} + H_{2}O + CO_{2}$ | $(iii)$ ओजोन क्षय |
| $(d)$ $NO_{2(g)} \stackrel{h \nu}{\longrightarrow} NO_{(g)} + O_{(g)}$ | $(iv)$ क्षोभमंडलीय प्रदूषण |
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