NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1863 - 1869 of 2028

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Question number: 1863

» Chemistry » Combustion and Flame

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MCQ▾

Question

Which type of reaction is combustion?

Choices

Choice (4)Response

a.

Redox reaction

b.

Substitution

c.

Oxidation

d.

Reduction

Question number: 1864

» Chemistry » Coal and Petroleum

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MCQ▾

Question

Select the true statement from the following regarding petroleum?

Choices

Choice (4)Response

a.

Heavies than water and insoluble in it

b.

Lighter than water & insoluble in water

c.

Heavies than water and soluble in it

d.

Lighter than water and soluble in it.

Question number: 1865

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

Which of the following metal did not give any reaction with Hydrochloric acid (HCl)?

Choices

Choice (4)Response

a.

Iron –

b.

Aluminium -

c.

Silver –

d.

Magnesium –

Question number: 1866

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

Which of the following will be produced if non-metals combine with oxygen?

Choices

Choice (4)Response

a.

Basic oxide

b.

Amphoteric oxide

c.

Acidic oxides

d.

Question does not provide sufficient data or is vague

Question number: 1867

» Chemistry » Coal and Petroleum

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MCQ▾

Question

The process “cracking” related to?

Choices

Choice (4)Response

a.

Petroleum

b.

Hydrocarbons

c.

Coke

d.

Coal

Question number: 1868

» Chemistry » Coal and Petroleum

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MCQ▾

Question

When oil well is drilled through rocks, which of the following comes out first?

Choices

Choice (4)Response

a.

Gas carbon

b.

Coal gas

c.

Natural gas

d.

Harsh gas

Question number: 1869

» Chemistry » Combustion and Flame

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MCQ▾

Question

When you take a burning wood and you poured water over that burning wood, the fire of wood goes off, because?

Choices

Choice (4)Response

a.

The flame vapourises

b.

Decrease in temperature of wood

c.

Water molecules reacts with oxygen present in that flame.

d.

Temperature of water goes-up

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