Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 83 - 90 of 209

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Question number: 83

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Question

MCQ▾

What are the products do you expect, when is passed over red hot coke?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 84

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Question

MCQ▾

The process involved in the formation of coal?

Choices

Choice (4)Response

a.

Vaporisation

b.

Evaporation

c.

Distillation

d.

Carbonisation

Question number: 85

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Question

MCQ▾

Homogeneous solid solution of two or more metals is termed as?

Choices

Choice (4)Response

a.

Metalloid solution

b.

Alloy

c.

Allotrope

d.

Isotope

Question number: 86

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Question

MCQ▾

Which of the following metals are present in ‘bell metal’?

Choices

Choice (4)Response

a.

Copper and tin

b.

Calcium and magnesium

c.

Zinc and copper

d.

Zinc and magnesium

Question number: 87

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Question

MCQ▾

Liquid petroleum gas LPG (Cooking gas) is a mixture of?

Choices

Choice (4)Response

a.

Butane and isobutane, propane

b.

Propane and Ethane

c.

Methane and Ethane

d.

Butane and Ethane

Question number: 88

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Question

MCQ▾

Select the fuel with highest calorific value from the following?

Choices

Choice (4)Response

a.

Natural gas

b.

Coke

c.

Kerosene

d.

Petrol

Question number: 89

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Question

MCQ▾

What is the temperature used in fractional distribution method for refining fuel oil?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 90

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Question

MCQ▾

What is the reason behind mercury is only used in thermometers?

Choices

Choice (4)Response

a.

It expands on heating

b.

It does not wet on the glass

c.

It is a liquid

d.

All a. , b. and c. are correct