NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1872 - 1879 of 2028

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Question number: 1872

» Chemistry » Combustion and Flame

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MCQ▾

Question

When fire is caused by burning petrol and oil, then what type of fire extinguishers must be used?

Choices

Choice (4) Response

a.

type

b.

Water type

c.

Soda-acid type

d.

Foam type

Question number: 1873

» Chemistry » Combustion and Flame

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MCQ▾

Question

Which of the following is required for the spontaneous combustion to take place?

Choices

Choice (4) Response

a.

A flame is required

b.

A spark required

c.

Rise in temperature is required

d.

Nothing is required

Question number: 1874

» Chemistry » Coal and Petroleum

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Question

Which of the following complex mixture of hydrocarbon is well known as crude oil?

Choices

Choice (4) Response

a.

Liquid hydrocarbons

b.

Solid hydrocarbons

c.

Gas hydrocarbons

d.

All a. , b. and c. are correct

Question number: 1875

» Chemistry » Metals and Non-Metals

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Question

What is the formula of ‘Alumina’?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1876

» Chemistry » Metals and Non-Metals

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Question

Which of the following is the chemical formula of magnetite?

Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

Question number: 1877

» Chemistry » Coal and Petroleum

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Question

Biogas is a mixture of?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1878

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

Metals can be made into thin sheets. This property is termed as?

Choices

Choice (4) Response

a.

Ductility

b.

Strength

c.

Malleability

d.

Density

Question number: 1879

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

Which of the following non-metal is liquid at room temperature?

Choices

Choice (4) Response

a.

Hydrogen

b.

Nitrogen

c.

Bromine

d.

Chlorine

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