Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 91 - 98 of 209

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Question number: 91

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Question

MCQ▾

Calamine is the ore of?

Choices

Choice (4)Response

a.

b.

c.

Magnesium –

d.

All of the above

Question number: 92

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Question

MCQ▾

If a fuel has calorific value of and amount of heat produced by burning that fuel is Joules, now how much fuel was burnt (in kg)?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 93

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Question

MCQ▾

Which of the following metals is known for its best conductivity?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 94

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Question

MCQ▾

Which fraction of petroleum has highest boiling point?

Choices

Choice (4)Response

a.

Diesel oil

b.

Kerosene

c.

Ether

d.

Gasoline

Question number: 95

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Question

MCQ▾

Oxides or hydroxides and ________ will be found when metal react with water?

Choices

Choice (4)Response

a.

Oxygen

b.

Hydrogen

c.

Carbon dioxide

d.

None of the above

Question number: 96

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Question

MCQ▾

Combustions are ________

Choices

Choice (4)Response

a.

Explosive

b.

Spontaneous, rapid, explosive

c.

Spontaneous only

d.

Question does not provide sufficient data or is vague

Question number: 97

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Question

MCQ▾

Which of the following is involved in the process of an anaerobic fermentation?

Choices

Choice (4)Response

a.

Petroleum

b.

Coal gas

c.

Water gas

d.

Biogas

Question number: 98

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Question

MCQ▾

Which of the following metal has the capability of gaining electron as well as losing an electron?

Choices

Choice (4)Response

a.

b.

Calcium Ca

c.

Mercury Hg

d.