Chemical Effects of Electric Current (NSO Level 1- Science Olympiad (SOF) Class 8): Questions 1 - 5 of 60

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Question number: 1

» Chemical Effects of Electric Current

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MCQ▾

Question

Chemical reactions taking place in a conducting solution by the passage of electricity is called

Choices

Choice (4) Response

a.

Electrical effect of chemical substance

b.

Chemical effect of electric current

c.

Chemical change due to electric current

d.

Question does not provide sufficient data or is vague

Question number: 2

» Chemical Effects of Electric Current

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Assertion-Reason▾

Question

Assertion (Ꭺ)

When the water falls down as rain drops, many impurities dissolve in it.

Reason (Ꭱ)

The presence of chemicals and impurities makes rain water a good conductor of electricity

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 3

» Chemical Effects of Electric Current

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MCQ▾

Question

Which of the following is not an application of electroplating?

1. Metals to prevent rusting

2. Galvanisation

3. In the field of cutlery and artificial jewellery.

Choices

Choice (4) Response

a.

3

b.

2

c.

1

d.

None of the above

Question number: 4

» Chemical Effects of Electric Current

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MCQ▾

Question

The right arrow in the figure shows the direction of

Choices

Choice (4) Response

a.

Flow of electrons

b.

Flow of protons

c.

Electric current

d.

None of the above

Question number: 5

» Chemical Effects of Electric Current

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MCQ▾

Question

The process used in extraction of metals from impure samples is called

Choices

Choice (4) Response

a.

Electroplating

b.

Electrification

c.

Electro refining

d.

Electrolysis

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