Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 104 - 112 of 208

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Question number: 104

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Question

MCQ▾

What is the mass of one mole of nitrogen atoms?

Choices

Choice (4)Response

a.

12g

b.

14g

c.

22g

d.

7g

Question number: 105

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Question

MCQ▾

How many number of moles does 168g of iron contain?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 106

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Question

MCQ▾

How many number of moles are there in of ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 107

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Question

MCQ▾

What is the number of molecules present in of magnesium oxide?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 108

Chemistry
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Question

MCQ▾

Which one of the following can diffuse than other?

Choices

Choice (4)Response

a.

Perfume

b.

Petrol

c.

Water

d.

Milk

Question number: 109

Chemistry
Edit

Question

MCQ▾

Solid cannot be compressed, because?

Choices

Choice (4)Response

a.

The inter-particle attractive forces are very weak.

b.

The movement of the constituent particle are not restricted

c.

The constituent particles are closely packed.

d.

Question does not provide sufficient data or is vague

Question number: 110

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Question

MCQ▾

Calculate how many gram atoms are present in grams of oxygen ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 111

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Question

MCQ▾

Calculate the number of moles present in of ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 112

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Question

MCQ▾

Which of the following species contain the least number of neutrons?

Choices

Choice (4)Response

a.

b.

c.

d.