JEE MAIN - Chemistry (2022 - 28th July Morning Shift - No. 3)
Match List - I with List - II.
| List - I | List - II | ||
|---|---|---|---|
| (A) | $$Cd(s) + 2Ni{(OH)_3}(s) \to CdO(s) + 2Ni{(OH)_2}(s) + {H_2}O(l)$$ | (I) | Primary battery |
| (B) | $$Zn(Hg) + HgO(s) \to ZnO(s) + Hg(l)$$ | (II) | Discharging of secondary battery |
| (C) | $$2PbS{O_4}(s) + 2{H_2}O(l) \to Pb(s) + Pb{O_2}(s) + 2{H_2}S{O_4}(aq)$$ | (III) | Fuel cell |
| (D) | $$2{H_2}(g) + {O_2}(g) \to 2{H_2}O(l)$$ | (IV) | Charging of secondary battery |
Choose the correct answer from the options given below:
$$(\mathrm{A})-(\mathrm{I}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{IV})$$
$$(\mathrm{A})-(\mathrm{IV}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{III})$$
$$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{IV}),(\mathrm{D})-(\mathrm{III})$$
$$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{IV})$$
Explanation
(a) $\mathrm{Cd}(\mathrm{s})+2 \mathrm{Ni}(\mathrm{OH})_3(\mathrm{~s}) \rightarrow \mathrm{CdO}(\mathrm{s})+2 \mathrm{Ni}(\mathrm{OH})_2(\mathrm{~s})$ $+\mathrm{H}_2 \mathrm{O}(l)$
Discharge of secondary Battery
(b) $\mathrm{Zn}(\mathrm{Hg})+\mathrm{HgO}$ (s) $\rightarrow \mathrm{ZnO}(\mathrm{s})+\mathrm{Hg}(l)$ (Primary Battery Mercury cell)
(c) $2 \mathrm{PbSO}_4(\mathrm{~s})+2 \mathrm{H}_2 \mathrm{O}(l) \rightarrow \mathrm{Pb}(\mathrm{s})+\mathrm{PbO}_2(\mathrm{~s})+$ $2 \mathrm{H}_2 \mathrm{SO}_4(\mathrm{aq})$ (Charging of secondary Battery)
(d) $2 \mathrm{H}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{H}_2 \mathrm{O}(l)$ (Fuel cell)
(b) $\mathrm{Zn}(\mathrm{Hg})+\mathrm{HgO}$ (s) $\rightarrow \mathrm{ZnO}(\mathrm{s})+\mathrm{Hg}(l)$ (Primary Battery Mercury cell)
(c) $2 \mathrm{PbSO}_4(\mathrm{~s})+2 \mathrm{H}_2 \mathrm{O}(l) \rightarrow \mathrm{Pb}(\mathrm{s})+\mathrm{PbO}_2(\mathrm{~s})+$ $2 \mathrm{H}_2 \mathrm{SO}_4(\mathrm{aq})$ (Charging of secondary Battery)
(d) $2 \mathrm{H}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{H}_2 \mathrm{O}(l)$ (Fuel cell)
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