NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1679 - 1684 of 2028

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Question number: 1679

» Physics » Chemical Effects of Electric Current

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MCQ▾

Question

A metal, which needs to be coated with a layer of desired metals in the electrolysis solution, is connected on:

Choices

Choice (4)Response

a.

Any electrode

b.

Half on anode and half of cathode

c.

Anode

d.

Cathode

Question number: 1680

» Biology » Microorganisms

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MCQ▾

Question

Bacteria are useful to humans and other organisms because they:

I. Can be used to prepare antibiotics

II. Are useful in agriculture for increasing soil fertility

III. Can help in the digestion of food in herbivores

Choices

Choice (4)Response

a.

I only

b.

I and II only

c.

II and III only

d.

I, II and III only

Question number: 1681

» Physics » Friction

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MCQ▾

Question

Two bodies relatively move only when:

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question number: 1682

» Physics » Chemical Effects of Electric Current

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MCQ▾

Question

A electric bulb glows, due to:

Choices

Choice (4)Response

a.

Electric energy is converted into heat energy

b.

Mechanical energy is converted into electric energy

c.

Heat energy is converted into electric energy

d.

All of the above

Question number: 1683

» Physics » Chemical Effects of Electric Current

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MCQ▾

Question

By passing electric current, a desire metal layer is depositing on another material. This process is called:

Choices

Choice (4)Response

a.

Electrolysis

b.

Electroplating

c.

Layering

d.

Magnetic plating

Question number: 1684

» Physics » Some Natural Phenomena

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MCQ▾

Question

We can get early warning for cyclones, by:

Choices

Choice (4)Response

a.

Helicopters

b.

Satellites

c.

Submarines

d.

Stars

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