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R.C. Mukherjee Test: Redox Reactions & Electrochemistry - NEET MCQ


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30 Questions MCQ Test Chemistry Class 12 - R.C. Mukherjee Test: Redox Reactions & Electrochemistry

R.C. Mukherjee Test: Redox Reactions & Electrochemistry for NEET 2024 is part of Chemistry Class 12 preparation. The R.C. Mukherjee Test: Redox Reactions & Electrochemistry questions and answers have been prepared according to the NEET exam syllabus.The R.C. Mukherjee Test: Redox Reactions & Electrochemistry MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for R.C. Mukherjee Test: Redox Reactions & Electrochemistry below.
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R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 1

The passage of current through a solution of certain electrolye results in the evolution of H2 at cathode and Cl2 at anode. The electrolytic solution is -

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 1

In this Cl  will oxidise to give Cl2 ,Na+ reduction potential has lower potential than water reduction polenlid so water will reduce to give H2.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 2

In an electrolytic cell current flows from -

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 2

In an electrolytic cell, current flows from cathode to anode in outer circuit and in daniell cell, it is the reverse direction of flow of current from anode to cathode in outer circuit.

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R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 3

When an aqueous solution of H2SO4 is electrolysed, the ion discharged at anode is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 3

Electrolysis of H2SO4
Cathode:-
2H+  +  2e-  -  H2    (Reduction)

Anode:-
4OH-  -  2H2O  +  O2  + 4e-  (Oxidation)

OHions discharged at anode.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 4

1 mole of Al is deposited by X coulomb of electricity passing through aluminium nitrate solution. The number of moles of silver deposited by X coulomb of electricity from silver nitrate solution is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 4

Since to deposit 1 mole of aluminium 3 columb of electricity is required, as the alency of silver is + 1 so 3 mole of silver will be deposited by 3C of electricity

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 5

A solution of Na2SO4 in water is electrolysed using Pt electrodes.The products at the cathode and anode are respectively -

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 5

At cathode
4H2O + 4e → 4H2 + 4OH
At anode
2H2O → 4H+ + O2 + 4e
Thus at cathode we will get H2 whereas at anode we will get O2.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 6

In electrolysis of a fused salt, the weight deposited on an electrode will not depend on-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 6

In electrolysis of a fused salt, the weight deposited on electrode will not depend or temperature.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 7

The electrolysis of a solution resulted in the formation of H2 at the cathode and Cl2 at the anode. The liquid is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 7

In this Cl will oxidise to give Cl2 Na+ water reduction potential has higher potential than that of water reduction potential, so water will reduce to give H2.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 8

Which loses charge at cathode-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 8

Cation loses charge at cathode as it gave electron

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 9

In the electrolysis of CuSO4, the reaction :

Cu2+ + 2e¯ → Cu, takes place at :

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 9

As reduction will take place at cathode so reaction Cu2+ + 2e → Cu
Will take place at cathode

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 10

If mercury is used as cathode in the electrolysis of aqueous NaCl solution, the ions discharged at cathode are-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 10

If mercury  is used as cathode in the electrolysis of aqueos NaCl solution then the metal is discharged at mercury to from amalgam.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 11

The specific conductance of a solution is 0.3568 ohm-1. When placed in a cell the conductance is 0.0268 ohm-1. The cell constant is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 11

K = 0.3568 W cm–1
condutance = 0.0268  Ω –1
K = G ×1/A
0.3568 = 0.0268 ×1/9
13.31 cm–1

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 12

A conductance cell was filled with a 0.02 M KCl solution which has a specific conductance of 2.768 × 10-3 ohm-1 cm-1. If its resistance is 82.4 ohm at 25ºC, the cell constant is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 12

K = G. L/A
10–3 × 2.768 = 1/R ×L/A
L/A = 228.08 × 10–3
= 0.2281 cm–1

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 13

The variation of equivalent conductance vs decrease in concentration of a strong electrolyte is correctly given in the plot -

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 13


On decreasing the value of M will increase but increase will be hyberbolic.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 14

Which of the following solutions has the highest equivalent conductance ?

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 14

Higher the dilution higher will be the equivalent conductance

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 15

The resistance of 0.01N solution of an electrolyte AB at 328K is 100 ohm. The specific conductance of solution is (cell constant = 1cm-1) -

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 15


R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 16

For an electrolytic solution of 0.05 mol L-1, the conductivity has been found to be 0.0110 Scm-1.The molar conductivity is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 16


R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 17

Two electrodes are fitted in conductance cell 1.5 cm apart while the area of cross section of each electrode is 0.75 cm2. The cell constant is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 17

L/A is cell constant.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 18

The best conductor of electricity is in 1M solution of-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 18

That electrolyte will be the best electrolyte which has maximum number of ions.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 19

A certain current liberates 0.504 g of H2 in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in CuSO4 solution -

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 19

gm eq.  of H2 = gm eq. of Cu

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 20

A currnet of 2.6 ampere is passed through CuSO4 solution for 6 minutes 20 seconds. The amount of Cu deposited is (At. wt. of Cu = 63.5, Faraday = 96500 C)-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 20


R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 21

Three Faradays of electricity are passed through molten Al2O3, aqueous solution of CuSO4 and molten NaCl taken in three different electrolytic cells. The amount of Al, Cu and Na deposited at the cathodes will be in the ratio of-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 21

gm equivalent of Al = gm eq. of Cu = gm eq. of Na
3 = 3 = 3
3/3/ = 3/2 = 1
1 : 1.5 : 3

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 22

The quantity of electricity required to liberate 0.01g equivalent of an element at the electrode is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 22

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 23

The unit of electrochemical equivalent is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 23

Z = w/it
w in gm
it in columb.
so z = gm/columb

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 24

One faraday of electricity will liberate one mole of metal from a solution of-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 24

Since KCl has the n-factor of 1 so 1 faraday of electricity will liberate one mole of metal from a solution.

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 25

The number of faraday required to generate 1 mole of Mg from MgCl2 is-

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 25

Since magnesium has the n-factor 2 so the number of faraday rquired to genereate 1 mole of Mg will be 2 .

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 26

One gm metal M+2 was discharged by the passage of 1.81×1022 electrons. What is the atomic weight of metal?

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 26

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 27

One mole of electron passes through each of the solution of AgNO3, CuSO4 and AlCl3 when Ag, Cu and Al are deposited at cathode. The molar ratio of Ag, Cu and Al deposited are

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 27

Molar ratio
All have the same equivalent

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 28

Salts of A (atomic weight = 7), B (atomic weight = 27) and C (atomic weight = 48) were electrolysed under identical conditions using the same quantity of electricity. It was found that when 2.1 g of A was deposited, the weights of B and C deposited were 2.7 and 7.2 g. The valencies of A, B and C respectively are

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 28


If x = 1 ⇒ y = 3, z = 2

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 29

The density of Cu is 8.94 g cm–3. The quantity of electricity needed to plate an area 10 cm × 10cm to a thickness of 10-2 cm using CuSO4 solution would be

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 29

Volume : 10 × 10 × 10–2 = 1 cm3
mass of Cu = 8.94 g


= 27172 C

R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 30

During electrolysis of an aqueous solution of sodium sulphate if 2.4 L of oxygen at STP was liberated at anode. The volume of hydrogen at STP, liberated at cathode would be :

Detailed Solution for R.C. Mukherjee Test: Redox Reactions & Electrochemistry - Question 30

Equivalent of H2 = Equivalent of O2


= 4.8 L

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