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Match List-I with List-II
List-I List-II
(A) $Cd (s) + 2 Ni {(OH)}_{3} (s) \to CdO (s) + 2 Ni {(OH)}_{2} (s) + H_{2} O (l)$ (I)
Primary
battery
(B) $Zn (Hg) + HgO (s) \to ZnO (s) + Hg (l)$ (II) Discharging of secondary battery
(C) $2 {PbSO}_{4} (s) + 2 H_{2} O (l) \to Pb (s) + {PbO}_{2} (s) + 2 H_{2} {SO}_{4} (aq)$ (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 :

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

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

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

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

answer is C.

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Detailed Solution

(a) $Cd (s) + 2 Ni {(OH)}_{3} (s) \to$

$CdO (s) + 2 Ni {(OH)}_{2} (s) + H_{2} O (l)$

Discharge of secondary Battery

$(b) Zn (Hg) + HgO (s) \to ZnO (s) + Hg (l)$ (Primary Battry Mercury cell)

$(c) 2 {PbSO}_{4} (s) + 2 H_{2} O (l) \to Pb (s) + {PbO}_{2} (s) + 2 H_{2} {SO}_{4} (aq)$

Charging of secondary Battery

$(d) 2 H_{2} (g) + O_{2} (g) \to 2 H_{2} O (l)$

Fuel cell

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