Current Electricity Test

Result

Current Electricity Test - 157

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Weekly Quiz Competition

Question 1
4 / -1

Two voltameters, one of copper and another of silver, are joined in parallel. When a total charge q flows through the voltameters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are z₁ and z₂ respectively the charge which flows through the silver voltammeter is

A

B

C

D

Solution
Question 2
4 / -1

The atomic weight of silver and copper are 108 and 64. A silver voltameter and a copper voltameter are connected in series and when current is passed 10.8 gm of silver is deposited. The mass of copper deposited will be

A
6.4 gm

B
12.8 gm

C
3.2 gm

D
10.8 gm

Solution
Question 3
4 / -1

Faraday\'s laws of electrolysis are related to

A
The atomic number of positive ion

B
The equivalent weight of electrolyte

C
The atomic number of negative ion

D
The velocity of positive ion
Question 4
4 / -1

In the process of electrolysis, the current is carried out inside the electrolyte by

A
Electrons

B
Atoms

C
Positive and negative ions

D
All of the above
Question 5
4 / -1

The amount of charge required to liberate 9 gm of aluminium (atomic weight = 27 and valency = 3) in the process of electrolysis is (Faraday\'s number = 96500 coulombs/gm equivalent)

A
321660 coulombs

B
69500 coulombs

C
289500 coulombs

D
96500 coulombs

Solution
Question 6
4 / -1

In an electroplating experiment, m gm of silver is deposited when 4 ampere of current flows for 2 minute. The amount (in gm) of silver deposited by 6 ampere of current for 40 second will be

A
4 m

B
m/2

C
m/4

D
2 m

Solution
Question 7
4 / -1

A current of 16 ampere flows through molten NaCl for 10 minute. The amount of metallic sodium that appears at the negative electrode would be

A
0.23 gm

B
1.15 gm

C
2.3 gm

D
11.5 gm

Solution
Question 8
4 / -1

The mass of a substance liberated when a charge ‘q’ flows through an electrolyte is proportional to

A
q

B
1/q

C
q²

D
1/q²
Question 9
4 / -1

A steady current of 5 amps is maintained for 45 mins. During this time it deposits 4.572 gm of zinc at the cathode of a voltameter. E.C.E. of zinc is

A
3.387 × 10^–4 gm/C

B
3.387 × 10^–4 C/gm

C
3.384 × 10^–3 gm/C

D
3.394 × 10^–3 C/gm

Solution
Question 10
4 / -1

The relation between Faraday constant F, electron charge e and avogadro number N is

A
F = N/e

B
F = Ne

C
N = F²

D
F = N²e

Solution