Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 86 - 94 of 208

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Question 86

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MCQ▾

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

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Choice (4)Response

a.

b.

c.

d.

Question 87

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MCQ▾

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

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Choice (4)Response

a.

b.

c.

d.

Question 88

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MCQ▾

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

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Choice (4)Response

a.

b.

c.

d.

Question 89

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MCQ▾

Which one is radioactive isotope of hydrogen?

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Choice (4)Response

a.

Tritium

b.

Deuterium

c.

Protium

d.

Question does not provide sufficient data or is vague

Question 90

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MCQ▾

How many number of electrons are present in ?

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Choice (4)Response

a.

b.

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d.

Question 91

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MCQ▾

How many moles of oxygen atoms are present in two moles of acetic acid?

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Choice (4)Response

a.

3

b.

1

c.

2

d.

4

Question 92

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MCQ▾

What is the mass of one atom of silver?

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b.

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d.

Question 93

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MCQ▾

How much volume does moles of contain?

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Choice (4)Response

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d.

Question 94

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MCQ▾

A sample of an oxide of nitrogen is found to contain nitrogen. What is its empirical formula?

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Choice (4)Response

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b.

c.

d.