MCQs of Electrochemistry

Electrochemistry MCQs

MCQs of Electrochemistry

Showing 41 to 50 out of 158 Questions

41.

The standard potential obtained by the reduction of silver ion on copper electrode is +0.46V. What will be the value of standard free energy (ΔG°) ?

(a)	-44.5 KJ
(b)	-98.0 KJ
(c)	-89.0 KJ
(d)	-89.0 J

42.

Pick the correct product ratio of Al : Cu : Na by using 3F current through Al₂O₃, CuSO₄ and NaCl solution.

(a)	3 : 4 : 6
(b)	2 : 1 : 6
(c)	3 : 2 : 1
(d)	2 : 3 : 6

43.

If the values of limiting molar conductivities of NaCl, HCl and CH₃COONa are 126.4, 425.9 and 91.0 S cm²mole^-1 respectively, then calculate the limiting molar conductivity of acetic acid.

(a)	39.05 S cm²mole^-1
(b)	3.905 S cm²mole^-1
(c)	3905 S cm²mole^-1
(d)	390.5 S cm²mole^-1

44.

Which of the following instruments is useful for the measurement of real potential of cell ?

(a)	Potentiometer
(b)	Galvanometer
(c)	Voltmeter
(d)	Ammeter

45.

1 Coulomb =_____

(a)	96500 Faraday
(b)	6.28 × 10¹⁸ electron
(c)	1 mole electron
(d)	96487 Faraday

46.

If same current is passed through solutions of AgNO₃ and ZnSO₄ and the number of atoms Ag_(x) and Zn_(y) deposited at the electron then _____

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

47.

What will be the quantity of electricity necessory to convert 1 mole

{MnO}_{4}^{-}

ion to Mn²⁺ ?

(a)	96500 Coulomb
(b)	2 × 96500 coulomb
(c)	5 × 96500 coulomb
(d)	7 × 96500 coulomb

48.

Which of the following formula is correct for standard cell ?

(a)	ΔG = nFE_cell
(b)	ΔG° = nFE_cell
(c)	-ΔG° = nFE°_cell
(d)	ΔG = nFE°_cell

49.

Which of the following compounds shows maximum equivalent conductance in their aqueous solutions ?

(a)	SrCl₂
(b)	BeCl₂
(c)	MgCl₂
(d)	CaCl₂

50.

State the correct symbolic representation of standard hydrogen electrode.

(a)	Pt \| H_{2(g) (1 bar)} \| H⁺_{(aq) (0.1M)}
(b)	H_{2(g) (1 bar)} \| H⁺_(1M) \| Pt
(c)	H_{2(g) (1 bar)} \| Pt \| H⁺_{(aq) (1M)}
(d)	Pt \| H_{2(g) (1 bar)} \| H⁺_{(aq) (1M)}

Showing 41 to 50 out of 158 Questions