NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1890 - 1897 of 2000

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Question number: 1890

» Chemistry » Atoms & Molecules

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MCQ▾

Question

Calculate the weight of moles of potassium perchlorate

Choices

Choice (4) Response

a.

367.52 g

b.

c.

d.

Question number: 1891

» Chemistry » The Nature of Matter

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MCQ▾

Question

Which of the following is an example for true solution?

Choices

Choice (4) Response

a.

In sulphur dioxide

b.

Mud in water

c.

Salt in water

d.

Copper in Silver

Question number: 1892

» Chemistry » Atoms & Molecules

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MCQ▾

Question

Find out the molecular formula of sodium sulphate?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1893

» Chemistry » Structure of the Atom

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MCQ▾

Question

The particle with 13 protons and electrons in?

Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

Question number: 1894

» Chemistry » The Nature of Matter

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MCQ▾

Question

Name the technique used to separate the dirt particles from clothes in washing machine?

Choices

Choice (4) Response

a.

Magnetic Separation

b.

Centrifugation

c.

Evaporation

d.

Filtration

Question number: 1895

» Chemistry » Structure of the Atom

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MCQ▾

Question

An unipositive ion of an element has electronic structure then what is the atomic number of ?

Choices

Choice (4) Response

a.

18

b.

17

c.

16

d.

19

Question number: 1896

» Chemistry » Atoms & Molecules

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MCQ▾

Question

Number of molecules in at STP is known as?

Choices

Choice (4) Response

a.

Loschmidt number

b.

Mole number

c.

Avogadro’s number

d.

Question does not provide sufficient data or is vague

Question number: 1897

» Chemistry » Matter

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MCQ▾

Question

Convert into Centigrade or Celsius scale?

Choices

Choice (4) Response

a.

b.

c.

d.

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