Chemistry-Atoms & Molecules (NSTSE (National Science Talent Search Exam- Unified Council) Class 9): Questions 1 - 8 of 57

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Question number: 1

» Chemistry » Atoms & Molecules

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Question

The number of moles present in 5 grams of is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2

» Chemistry » Atoms & Molecules

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Question

What is the weight of 16 gram atoms of sulphur?

Choices

Choice (4) Response

a.

b.

c.

400g

d.

Question number: 3

» Chemistry » Atoms & Molecules

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Question

How much weight does litre of at . have?

Choices

Choice (4) Response

a.

10g

b.

15g

c.

d.

22.4g

Question number: 4

» Chemistry » Atoms & Molecules

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Question

How many gram atoms are present in magnesium?

Choices

Choice (4) Response

a.

4

b.

1

c.

2

d.

3

Question number: 5

» Chemistry » Atoms & Molecules

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Question

How many molecules of water and oxygen atoms are present in 9g of water?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 6

» Chemistry » Atoms & Molecules

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Question

How many number of moles does liters of contain under normal conditions?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 7

» Chemistry » Atoms & Molecules

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The total number of moles of nitrogen in 7 g of nitrogen is ________.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 8

» Chemistry » Atoms & Molecules

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Question

Which one is radioactive isotope of hydrogen?

Choices

Choice (4) Response

a.

Tritium

b.

Deuterium

c.

Protium

d.

Question does not provide sufficient data or is vague

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