NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1888 - 1895 of 2028

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Question number: 1888

» Chemistry » Combustion and Flame

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MCQ▾

Question

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: 1889

» Chemistry » Combustion and Flame

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MCQ▾

Question

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: 1890

» Chemistry » Coal and Petroleum

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MCQ▾

Question

Which of the following coal format has highest boiling point?

Choices

Choice (4) Response

a.

Lignite

b.

Bituminous

c.

Peat

d.

Anthracite

Question number: 1891

» Chemistry » Combustion and Flame

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MCQ▾

Question

The bottle in soda-acid extinguisher contains?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1892

» Chemistry » Coal and Petroleum

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MCQ▾

Question

What are A and B in the following reaction .

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1893

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

Which of the following property of Tungsten metal makes it to be used in electric bulbs?

Choices

Choice (4) Response

a.

Its high density

b.

Its metallic character

c.

Its sonority

d.

Its tensile strength

Question number: 1894

» Chemistry » Combustion and Flame

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MCQ▾

Question

What are the products formed when methane burns in air?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1895

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

Select the true statement from the following

Choices

Choice (4) Response

a.

Some non-metals are ductile

b.

Generally, metals are ductile

c.

All non-metals are ductile

d.

All metals are ductile

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