NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 1438 - 1444 of 1484

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Question number: 1438

» Chemistry » Carbon and Its Compounds

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Question

Which of the following compound has IUPAC name “Formaldehyde”?

Choices

Choice (4) Response

a.

b.

c.

HCHO

d.

Question number: 1439

» Chemistry » Metals and Non-Metals

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Question

Which of the following is used calico printing, print industry and to joining the pieeces of china clay?

Choices

Choice (4) Response

a.

Water glass

b.

Calcium Chloride

c.

Silicones

d.

Carborandum

Question number: 1440

» Chemistry » Metals and Non-Metals

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Question

Which of the following metallurgical operation is correct at high temperature?

Choices

Choice (4) Response

a.

Electrometallurgy

b.

Pyrometallurgy

c.

Hydrometallurgy

d.

All of the above

Question number: 1441

» Chemistry » Metals and Non-Metals

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Question

Which of the below method is used to obtain pure metal or method used for purification of metal?

Choices

Choice (4) Response

a.

Electrolytic refining

b.

Gravity separation

c.

Froth Floatation

d.

Magnetic separation

Question number: 1442

» Chemistry » Metals and Non-Metals

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Question

…………. . element liberate when react with diluted nitric acid?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1443

» Chemistry » Carbon and Its Compounds

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Question

…… has cleaning properties on clothes in water while using detergent?

Choices

Choice (4) Response

a.

Benzene sulphuric acid

b.

Benzene sulphide

c.

Benzene sulphate

d.

Benzene sulphonate

Question number: 1444

» Chemistry » Metals and Non-Metals

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Question

What is the purpose of polling process?

Choices

Choice (4) Response

a.

Removal of from

b.

Removal of from

c.

Removal of from

d.

For the removal of from

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