NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1916 - 1922 of 2028

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Question number: 1916

» Chemistry » Combustion and Flame

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MCQ▾

Question

Select the non-combustible substance from the following substances?

Choices

Choice (4)Response

a.

Coal

b.

Coke

c.

Wood

d.

Diamond

Question number: 1917

» Chemistry » Coal and Petroleum

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MCQ▾

Question

The fire goes off when sand is poured over some other burning material, it is because of?

Choices

Choice (4)Response

a.

The air supply is cut-off

b.

Sand is bad conductor of heat

c.

The temperature is brought down by sand

d.

Question does not provide sufficient data or is vague

Question number: 1918

» Chemistry » Coal and Petroleum

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MCQ▾

Question

Gobar gas which is produced from cow dung and plant waste contain mainly?

Choices

Choice (4)Response

a.

Acetylene

b.

Ethane

c.

Propane

d.

Methane

Question number: 1919

» Chemistry » Combustion and Flame

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MCQ▾

Question

When wood is used as fuel in chullahs these must be some gaps left in between the logs of wood, why because?

Choices

Choice (4)Response

a.

Less consumption of wood

b.

To control temperature

c.

Movement of air

d.

None of the above

Question number: 1920

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

Which of the following is chemical formula of cuprite?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1921

» Chemistry » Combustion and Flame

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MCQ▾

Question

Which of the following is an example for rapid combustion?

Choices

Choice (4)Response

a.

White phosphorous

b.

Cracker

c.

Candle

d.

None of the above

Question number: 1922

» Chemistry » Combustion and Flame

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MCQ▾

Question

Which of the following compound is present in foam type extinguisher bottle?

Choices

Choice (4)Response

a.

b.

c.

d.

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