NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1880 - 1887 of 2028

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Question number: 1880

» Chemistry » Coal and Petroleum

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MCQ▾

Question

Which of the following type of fuel will give smoke and ash on combustion?

Choices

Choice (4) Response

a.

Solid fuels

b.

Liquid fuels

c.

Gaseous fuels

d.

Question does not provide sufficient data or is vague

Question number: 1881

» Chemistry » Combustion and Flame

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MCQ▾

Question

When we observe LPG (Cooking gas) flame the “blue zone” indicates?

Choices

Choice (4) Response

a.

Un burn vapours

b.

Moderately hot

c.

Complete Combustion

d.

Partial decomposition

Question number: 1882

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

Prevention of metal corrosion can done, when contact between metal and ________ in cut-off?

Choices

Choice (4) Response

a.

Hydrogen

b.

Carbon

c.

Oxygen

d.

Nitrogen

Question number: 1883

» Chemistry » Coal and Petroleum

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MCQ▾

Question

The slurry residue after obtaining biogas is used as?

Choices

Choice (4) Response

a.

Insecticide

b.

Pesticide

c.

Manure

d.

Question does not provide sufficient data or is vague

Question number: 1884

» Chemistry » Metals and Non-Metals

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Question

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

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1885

» Chemistry » Coal and Petroleum

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MCQ▾

Question

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: 1886

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

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: 1887

» Chemistry » Coal and Petroleum

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MCQ▾

Question

Which of the following is carcinogenic for human body?

Choices

Choice (4) Response

a.

Oxides of nitrogen

b.

c.

Lead compounds (lead)

d.

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