Current Electricity Test

Result

Current Electricity Test - 159

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Weekly Quiz Competition

Question 1
4 / -1

The resistance of a cell does not depend on

A
Current drawn from the cell

B
Temperature of electrolyte

C
Concentration of electrolyte

D
The e.m.f. of the cell
Question 2
4 / -1

The electrochemical equivalent of a metal is 3.3 × 10^–7 kg/coulomb. The mass of the metal liberated at the cathode when a 3 A current is passed for 2 seconds will be

A
19.8 × 10^–7 kg

B
9.39 × 10^–7 kg

C
6.6 × 10^–7 kg

D
1.1 × 10^–7 kg

Solution
Question 3
4 / -1

Faraday\'s 2nd law states that mass deposited on the electrode is directly proportional to

A
Atomic mass

B
Atomic mass × Velocity

C
Atomic mass/Valency

D
Valency

Solution
Question 4
4 / -1

The electrochemical equivalent of a material in an electrolyte depends on

A
The nature of the material

B
The current through the electrolyte

C
The amount of charge passed through electrolyte

D
The amount of material present in electrolyte
Question 5
4 / -1

If 96500 coulombs of electricity liberates one gram equivalent of any substance, the time taken for a current of 0.15 amperes to deposit 20 mg of copper from a solution of copper sulphate is (Chemical equivalent of copper = 32)

A
5 min 20 sec

B
6 min 42 sec

C
4 min 40 sec

D
5 min 50 sec

Solution
Question 6
4 / -1

How much current should be passed through acidified water for 100 s to liberate 0.224 litre of H₂

A
22.4 A

B
19.3 A

C
9.65 A

D
1 A

Solution
Question 7
4 / -1

Who among the following scientists made the statement- \"Chemical change can produce electricity\"

A
Galvani

B
Faraday

C
Coulomb

D
Thomson
Question 8
4 / -1

The current flowing in a copper voltameter is 3.2 A. The number of copper ions (Cu²⁺ ) deposited at the cathode per minute is

A
0.5 × 10²⁰

B
1.5 × 10²⁰

C
3 × 10²⁰

D
6 × 10²⁰

Solution
Question 9
4 / -1

A copper and a chromium voltameter are connected in series with a battery. It found that in half an hour 0.475 g of copper and 0.130 g of chromium have been deposited. The ECE ratio of copper and chromium is

A
0.274

B
0.523

C
3.65

D
1.85

Solution
Question 10
4 / -1

When a current passes through the junction of two different metals, evolution or absorption of heat at the junction is known as

A
Joule effect

B
Seebeck effect

C
Peltier effect

D
Thomson effect