NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1918 - 1925 of 2028

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Question number: 1918

» Chemistry » Coal and Petroleum

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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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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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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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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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Question

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

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1923

» Chemistry » Metals and Non-Metals

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Question

Select the most reactive metal among the following set of metals?

Choices

Choice (4) Response

a.

Aluminium

b.

Calcium

c.

Lead

d.

Nickel

Question number: 1924

» Chemistry » Combustion and Flame

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MCQ▾

Question

________ is the process in which a substance is burned in presence of air with evolution of heat?

Choices

Choice (4) Response

a.

Combustion

b.

Distillation

c.

Carbonisations

d.

Refining

Question number: 1925

» Chemistry » Metals and Non-Metals

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Question

The colour of Iodine is?

Choices

Choice (4) Response

a.

Violet

b.

White

c.

Green

d.

Brown

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