MCQs of Electrochemistry

Electrochemistry MCQs

MCQs of Electrochemistry

Showing 101 to 110 out of 158 Questions

101.

Which half cell will act as anode in the cell :

Pt | H_{2(g)(1 bar)} | HCl_(pH=3) || HCl_(pH=6) | H_{2(g)(1 bar)} | Pt

(a)	LHS half cell.
(b)	RHS half cell.
(c)	In the beginning LHS half cell and in the end RHS half cell.
(d)	Either of the two half cells can act as anode.

102.

State the value of [H⁺] in 0.01 M KOH solution ?

(a)	0.0 M
(b)	0.01 M
(c)	$\frac{K_{w}}{0.01} M$
(d)	$\frac{0.01}{K_{w}} M$

103.

Select the correct condition so that the following concentration cell can operate spontaneously (i.e. on its own). Zn_(s) | Zn²⁺ (C₁) || Zn²⁺ (C₂) | Zn_(s), where C₁ and C₂ are the corresponding concentration.

(a)	C₁ > C₂
(b)	C₁ < C₂
(c)	C₁ = C₂
(d)	Cannot be predicted

104.

When will be E_cell > 0 for the following cell ?

P t | C l_{2 (P_{1} b a r)} | C {l^{-}}_{(1 M)} | C l_{2 (P_{2} b a r)} | P t

(a)	P₁ > P₂
(b)	P₁ < P₂
(c)	P₁ = P₂
(d)	P₁ + P₂ = 1 bar

105.

At 298 K temperature emf of Daniell cell, Zn | ZnSO₄ (0.01 M) || CuSO₄ (1.0 M) | Cu is E₁. If concentration of ZnSO₄ solution is 1 M and that of CuSO₄ is 0.01 M, the emf changes to E₂. State the relation between E₁ and E₂.

(a)	E₁ > E₂
(b)	E₁ < E₂
(c)	E₁ = E₂
(d)	E₂ = 0 ≠ E₁

106.

A hypothetical electrochemical cell is given below :

A | A⁺_(xM) || B⁺_(yM) | B, E°_cell = +0.20 V

Write corresponding cell reaction.

(a)	A + B⁺ → A⁺ + B
(b)	A⁺ + B → A + B⁺
(c)	A⁺ + e^- → A, B⁺ + e^- → B
(d)	Cell reaction cannot be given

107.

If identical electric current is passed for the same time through AgNO₃ and CuSO₄ solutions, and if the number of atoms of Ag and Cu are respectively x and y that are deposited at electrodes, then _____ .

(a)	x = y
(b)	x < y
(c)	y = 2x
(d)	x = 2y

108.

m gram metal deposits on cathode when C ampere electric current is passed for t seconds through an electrolytic solution. Select the correct option to determine the equivalent weight of the metal.

(a)	$E = \frac{c \times t \times 96500}{m}$
(b)	$E = \frac{c \times t}{m \times 96500}$
(c)	$E = \frac{96500 \times m}{c \times t}$
(d)	$E = \frac{c \times m}{t \times 96500}$

109.

When 10 A current is passed for 10 hours through SnCl₂ solution, W₁ g Sn is obtained. When 5 A current is passed for 10 hours through SnCl₄ solution, W₂ g Sn is obtained. The relation between the weights of Sn is _____ .

(a)	2W₁ = W₂
(b)	W₁ = W₂
(c)	W₁ = 2 W₂
(d)	$W_{1} = \frac{1}{3} W_{2}$

110.

The quantity of electricity required to reduce 1 mole MnO₄^- into MnO₂ is _____ .

(a)	1 F
(b)	3 F
(c)	5 F
(d)	6 F

Showing 101 to 110 out of 158 Questions