CBSE Class 12 Electrochemistry Multiple Choice Questions with Answers. MCQ Questions Class 12 Electrochemistry with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Electrochemistry MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Electrochemistry with Answers - Set - 4
Question 1:
How many coulombs of electricity is required to reduce 1 mole of Cr2O2-7 in acidic medium?
(a) 4 × 96500 C
(b) 6 × 96500 C
(c) 2 × 96500 C
(d) 1 × 96500 C
Correct Answer – (B)
Question 2 :
How much electricity in in terms of Faraday is required to produce 100 g of Ca from molten CaCl2?
(a) 1F
(b) 2F
(c) 3F
(d) 5F
Correct Answer – (D)
Question 3 :
How long would it take to deposit 50 g of Al from an electrolytic cell containing Al2O3 using a current of 105 ampere?
(a) 1.54 h
(b) 1.42 h
(c) 1.32 h
(d) 2.15 h
Correct Answer – (B)
Question 4 :
The molar conductivity is maximum for the solution of concentration
(a) 0.004 M
(b) 0.002 M
(c) 0.005 M
(d) 0.001 M
Correct Answer – (D)
Question 5 :
The specific conductivity of N/10 KCl solution at 20°C is 0.0212 ohm-1 cm-1 and the resistance of the cell containing this solution at 20°C is 55 ohm. The cell constant is
(a) 3.324 cm-1
(b) 1.166 cm-1
(c) 2.372 cm-1
(d) 3.682 cm-1
Correct Answer – (B)
MCQ Questions Class 12 Electrochemistry with Answers
Question 6:
If a current of 1.5 ampere flows through a metallic wire for 3 hours, then how many electrons would flow through the wire?
(a) 2.25 × 1022 electrons
(b) 1.13 × 1023 electrons
(c) 1.01 × 1023 electrons
(d) 4.5 × 1023 electrons
Correct Answer – (C)
Question 7:
The charge required for reducing 1 mole of MnO−4 to Mn2- is
(a) 1.93 × 105 C
(b) 2.895 × 105 C
(c) 4.28 × 105 C
(d) 4.825 × 105 C
Correct Answer – (D)
Question 8:
Units of the properties measured are given below. Which of the properties has been not matched correctly?
(a) Molar conductance = Sm2 mol-1
(b) Cell constant = m-1
(c) Specific conductance of = S m²
(d) Equivalence conductance = S m² (g eq)-1
Correct Answer – (C)
Question 9:
Faraday’s law of electrolysis is related to
(a) Atomic number of cation
(b) Speed of cation
(c) Speed of anion
(d) Equivalent weight of electrolyte
Correct Answer – (D)
Question 10:
Electrical conductance through metals is called metallic or electronic conductance and is due to the movement of electrons. The electronic conductance depends on
(a) the nature and structure of the metal
(b) the number of valence electrons per atom
(c) change in temperature
(d) all of these
Correct Answer – (D)
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