MCQs Question Bank (Competition Preparation) - Electro Chemistry Class 12 Notes | EduRev

Chemistry Class 12

Created by: Mohit Rajpoot

Class 12 : MCQs Question Bank (Competition Preparation) - Electro Chemistry Class 12 Notes | EduRev

 Page 1


LEARNERS HABITAT
1] Which of the following is not an electronic conductor?
a) Graphite b) fused NaCl c) silver d) CdS
2] The reason for increase in electrical conduction of electrolyte with increase in
temperature is
a) Increase in the number of ions
b) increase in the speed of ions
c) Increase in the degree of dissociation of electrolyte
d) all the three
3] When an aqueous solution of copper sulphate is electrolysed using copper electrodes
the reaction at the anode is represented by
a) H
+
 + e¯ ? H b) Cu
2+ 
+ 2e¯ ? Cu
c) SO
2
4
?
 (aq) ? SO
4
 + 2e¯ d) Cu(s) ? Cu
2+
 (aq) + 2e¯
4] The product obtained at the anode when aqueous solution of CuSO
4
 is electrolysed
using platinum electrodes (or inert electrodes) is
a) SO
2
 gas b) SO
3
 gas c) O
2
gas d) Cu metal
5] Aqueous solution of CuSO
4
 is electrolysed using inert electrodes till the blue coloured
solution becomes colorless. The colourless solution formed is
a)Cu (OH)
2
b) H
2
SO
4
c) CuSO
4
d) H
2
O
6] The same quantity of electricity is passed through 0.1 M H
2
SO
4 
and 0.1 M HCl. The
amounts of H
2
 obtained at the cathodes are in the ratio.
a) 1: 1 b) 2: 1 c)1: 2 d) 3: 1
7] On passing 3F electricity through three cells containing fused Na
2
CO
3
, fused Cu(NO
3
)
2
and fused Al (NO
3
)
3
, the no of moles of the metals deposited are in the ratio
a) 1: 2: 3 b) 3: 2: 1 c) 6: 3: 2 d) 3: 4: 2
8] For the electrolytic production of NaClO
4
 from NaClO
3
 according to the equation
NaClO
3
 + H
2
O ? NaClO
4
 + H
2
, the number of faradays of electricity required to
produce 0.5 mole of NaClO
4
 is
a) 1 b) 2 c) 3 d) 1.5
LH Practice Sheet ELECTRO CHEMISTRY
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in Page 1
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