Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 67 - 74 of 209

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Question number: 67

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Question

MCQ▾

Which of the following will produce the sulphuric acid when dissolved in water?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 68

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Question

MCQ▾

Which of the following can produce fly ash?

Choices

Choice (4)Response

a.

Natural gas

b.

Coal

c.

Petroleum

d.

All of the above

Question number: 69

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Question

MCQ▾

Which of the following ore is an ore of iron

Choices

Choice (4)Response

a.

Bauxite

b.

Haematite

c.

Magnetite

d.

Both b. and c. are correct

Question number: 70

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Question

MCQ▾

Which of the following is carcinogenic for human body?

Choices

Choice (4)Response

a.

Oxides of nitrogen

b.

c.

Lead compounds (lead)

d.

Question number: 71

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Question

MCQ▾

Which of the following helps to putting out the fire in soda-acid fire extinguisher?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 72

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Question

MCQ▾

If the temperature falls down below to its ignition temperature, than the substance will be ________?

Choices

Choice (4)Response

a.

Dim burning

b.

Brightly burning

c.

Burning with smoke

d.

Extinguished

Question number: 73

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Question

MCQ▾

Which of the following coal format has highest boiling point?

Choices

Choice (4)Response

a.

Lignite

b.

Bituminous

c.

Peat

d.

Anthracite

Question number: 74

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Question

MCQ▾

The bottle in soda-acid extinguisher contains?

Choices

Choice (4)Response

a.

b.

c.

d.