NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1865 - 1871 of 2028

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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

Question number: 1870

» Chemistry » Metals and Non-Metals

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MCQ▾

Question

To which of the following category does the elements Arsenic and Antimony belongs?

Choices

Choice (4) Response

a.

Metalloids

b.

Minerals

c.

Metals

d.

Non-metals

Question number: 1871

» Chemistry » Combustion and Flame

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MCQ▾

Question

Inspite of having dangerous problems with hydrogen, it is used as fuel for some applications. What are they?

Choices

Choice (4) Response

a.

Car fuel

b.

Oxyhydrogen flame

c.

Rocket fuel

d.

All a. , b. and c. are correct

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