MCQs of Electrochemistry

Electrochemistry MCQs

MCQs of Electrochemistry

Showing 71 to 80 out of 158 Questions

71.

What is approximate potential of hydrogen fuel cell ?

(a)	2.0 Volt
(b)	1.5 Volt
(c)	1.23 Volt
(d)	2.3 Volt

72.

From which of the following acidic solutions maximum copper will be liberated when 1 F electric current is passed through solution ?

(a)	2 M Cu(NO₃)₂
(b)	1 M Cu₂Cl₂
(c)	5 M CuSO₄
(d)	5 M Cu₃(PO₄)₂

73.

Which reactions takes place at the anode in lead storage cell ?

(a)	${Pb}_{(aq)} + {SO}_{4 (aq)}^{2 -} \to PbS O_{4 (s)} + 2 e^{-}$
(b)	${Pb}^{2 +}_{(aq)} + 2 e^{-} \to Pb (s)$
(c)	$Pb (s) \to {Pb}^{2 +}_{(aq)} + 2 e^{-}$
(d)	$PbS O_{4 (s)} + 2 H_{2} O_{(l)} \to {PbO}_{2 (s)} + {SO}_{4 (aq)}^{2 -} + 4 {H^{+}}_{(aq)} + 2 e^{-}$

74.

What will be the equivalent weight of K₂Cr₂O₇ in acidic medium ? (M = Molecular mass)

(a)	$\frac{M}{3}$
(b)	$\frac{M}{4}$
(c)	$\frac{M}{6}$
(d)	$\frac{M}{2}$

75.

What is the SI unit of conducatance ?

(a)	S
(b)	A
(c)	Ohm
(d)	V

76.

What will not be obtained at the anode during electrolysis of mixture of A1₂O₃ + Na₃AIF₆ ?

(a)	CO₂
(b)	AI
(c)	O₂
(d)	CO₄

77.

How many moles of aluminium will be obtained by 1 Faraday electric charge ?

(a)	1 mole
(b)	$\frac{1}{3} mole$
(c)	$\frac{1}{2} mole$
(d)	3 mole

78.

The values of standard reduction potentials of A, B and C are 0.34 V, -0.80 V and -0.46 V respectively. Mention the order of their strength as reducing agent ?

(a)	C > B > A
(b)	A > B > C
(c)	B > C > A
(d)	C > A > B

79.

1 mole electrons are passed through CuSO₄, AgNO₃ and AlCl₃, What will be the mole ratio of Cu, Ag and Al collected at the electrodes ?

(a)	1 : 1 : 1
(b)	1 : 2 : 3
(c)	2 : 1 : 3
(d)	3 : 6 : 2

80.

λ⁰_NaCl = 126 S, cm² mole^-1, λ⁰_KBr = 152 S cm² mole^-1, λ⁰_KCl = 150 S, cm² mole^-1 then find λ⁰_NaBr.

(a)	178 S cm² mole^-1
(b)	1765 S cm² mole^-1
(c)	128 S cm² mole^-1
(d)	202 S cm² mole^-1

Showing 71 to 80 out of 158 Questions