Electrochemistry Test

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Electrochemistry Test - 17

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Weekly Quiz Competition

Question 1
4 / -1

The amount of electricity required to produce one mole of copper from copper sulphate solution will be

A
1 F

B
2.33 F

C
2 F

D
1.33 F

Solution
Question 2
4 / -1

A current of 12 A is passed through an electrolytic cell containing aqueous NiSO₄ solution. Both Ni and H₂ gas are formed at the cathode. The current efficiency is 60%. What is the mass of nickel deposited on the cathode per hour?

A
7.883 g

B
3.941 g

C
5.91 g

D
2.645 g

Solution
Question 3
4 / -1

The cathodic reaction of a dry cell is represented by
2MnO₂ (s) + Zn²⁺ + 2e^‒ → ZnMn₂ O₄ (s)
If, there arc 8 g of MnO₂, in the cathodic compartment then the time for which the dry cell will continue to give a current of 2 mA is

A
25.675 day

B
51.35 day

C
12.8 day

D
6.423 day
Question 4
4 / -1

In acidic medium MnO^-₄ is converted to Mn²⁺. The quantity of electricity in Faraday required to reduce 0.5 mole of MnO^-₄ to Mn²⁺ would be

A
2.5

B
5

C
1

D
0.5

Solution
Question 5
4 / -1

During electrolysis of water the volume of O₂ liberated is 2.24 dm³. The volume of hydrogen liberated, under same conditions will be

A
2.24 dm³

B
1.12 dm³

C
4.48 dm³

D
0.56 dm³
Question 6
4 / -1

What is the time (in sec) required for depositing all the silver present in 125 mL of 1 M AgNO₃ solution by passing a current of 241.25 A ? (1F = 96500 C)

A
10

B
50

C
1000

D
100
Question 7
4 / -1

Assertion (A) A current of 96.5 A is passed into aqueous AgNO₃ solution for 100 s. The weight of silver deposited is 10.8 g (Atomic weight of Ag =108)
Reason (R) The mass of a substance deposited during the electrolysis of an electrolyte is inversely proportional to the quantity of electricity passing through the electrolyte.

A
Both A and R are correct and R is the correct explanation of A

B
Both A and R are correct but R is not the correct explanation of A

C
A is correct but R is incorrect

D
A is incorrect but Reason is correct
Question 8
4 / -1

The laws of electrolysis were proposed by

A
Kohlrausch

B
Faraday

C
Haber

D
Bergius
Question 9
4 / -1

What is the quantity of electricity (in Coulombs) required to deposit all the silver from 250 mL of 1 MAgNO₃ solution ?

A
2412.5

B
24125

C
4825.0

D
48250
Question 10
4 / -1

Which of the following is not correct ?

A
Aqueous solution of NaCl is an electrolyte

B
The units of electrochemical equivalent are g-coulomb

C
In the Nernst equation, n represents the number of electrons transferred in the electrode reaction

D
Standard reduction potential of hydrogen electrode is zero volt.

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Re-Attempt Weekly Quiz Competition

Electrochemistry Test - 17

Result

Electrochemistry Test - 17

Score

-

Rank

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SHARING IS CARING

Question 1

1 F

2.33 F

2 F

1.33 F

Solution

Question 2

7.883 g

3.941 g

5.91 g

2.645 g

Solution

Question 3

25.675 day

51.35 day

12.8 day

6.423 day

Question 4

2.5

5

1

0.5

Solution

Question 5

2.24 dm3

1.12 dm3

4.48 dm3

0.56 dm3

Question 6

10

50

1000

100

Question 7

Both A and R are correct and R is the correct explanation of A

Both A and R are correct but R is not the correct explanation of A

A is correct but R is incorrect

A is incorrect but Reason is correct

Question 8

Kohlrausch

Faraday

Haber

Bergius

Question 9

2412.5

24125

4825.0

48250

Question 10

Aqueous solution of NaCl is an electrolyte

The units of electrochemical equivalent are g-coulomb

In the Nernst equation, n represents the number of electrons transferred in the electrode reaction

Standard reduction potential of hydrogen electrode is zero volt.

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2.24 dm³

1.12 dm³

4.48 dm³

0.56 dm³