JEE Main 2022 · 28 Jul · Shift 1 · Chemistry Q63 · Dronacharya Exams

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ChemistryList match+4 / -1Question 63 of 90

Match List - I with List - II.

Choose the correct answer from the options given below :

List - I

A
$\mathrm{Cd(s)+2Ni(OH)_3(s)\rightarrow CdO(s)+2Ni(OH)_2(s)+H_2O(\mathit l)}$
B
$\mathrm{Zn(Hg)+HgO(s)\rightarrow ZnO(s)+Hg(\mathit l)}$
C
$\mathrm{2PbSO_4(s)+2H_2O(\mathit l)\rightarrow Pb(s)+PbO_2(s)+2H_2SO_4(aq)}$
D
$\mathrm{2H_2(g)+O_2(g)\rightarrow2H_2O(\mathit l)}$

List - II

I
Primary battery
II
Discharging of secondary battery
III
Fuel cell
IV
Charging of secondary battery

A

(A) - (I), (B) - (II), (C) - (III), (D) - (IV)

B

(A) - (IV), (B) - (I), (C) - (II), (D) - (III)

C

(A) - (II), (B) - (I), (C) - (IV), (D) - (III)

D

(A) - (II), (B) - (I), (C) - (III), (D) - (IV)

Answer and worked solution

Official answer: C

Batteries.

Ni-Cd discharging: secondary battery.
Mercury cell: primary battery.
$\mathrm{PbSO_4}$ to Pb and $\mathrm{PbO_2}$ : charging a lead storage battery.
$\mathrm{H_2}$ - $\mathrm{O_2}$ : fuel cell.

(C)

Topics:Batteries and corrosion

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