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:
Solution
(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<br/><br/>
(b) $\mathrm{Zn}(\mathrm{Hg})+\mathrm{HgO}$ (s) $\rightarrow \mathrm{ZnO}(\mathrm{s})+\mathrm{Hg}(l)$
(Primary Battery Mercury cell)<br/><br/>
(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)<br/><br/>
(d) $2 \mathrm{H}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{H}_2 \mathrm{O}(l)$ (Fuel cell)
About this question
Subject: Chemistry · Chapter: Electrochemistry · Topic: Electrochemical Cells
This question is part of PrepWiser's free JEE Main question bank. 127 more solved questions on Electrochemistry are available — start with the harder ones if your accuracy is >70%.