NSTSE (National Science Talent Search Exam- Unified Council) Class 6: Questions 1832 - 1840 of 2029

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Question number: 1832

» Chemistry » Air Around Us

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Question

Who proved that air is the mixture of various types of gases?

Choices

Choice (4) Response

a.

Anton Lavoisier

b.

Lavoisier Anton

c.

Antoine Lavoisier

d.

None of the above

Question number: 1833

» Chemistry » Sorting Materials into Groups

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Question

In the following figure which process is defined?

Image showing separating funnel.

Image Showing Separating Funnel.

Image showing separating funnel.

Choices

Choice (4) Response

a.

Decantation

b.

Separating funnel

c.

Sedimentation

d.

Sieving

Question number: 1834

» Chemistry » Air Around Us

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Question

Gas which human exhale?

Choices

Choice (4) Response

a.

Nitrogen

b.

Oxygen

c.

Carbon di-oxide

d.

All of the above

Question number: 1835

» Chemistry » Air Around Us

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Question

Which of the following is not an inert gas?

Choices

Choice (4) Response

a.

Krypton

b.

Hydrogen

c.

Helium

d.

Xenon

Question number: 1836

» Chemistry » Sorting Materials into Groups

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Question

Example of heterogeneous mixture is

Choices

Choice (4) Response

a.

Peanut butter

b.

Water and petrol

c.

Cough syrup

d.

All of the above

Question number: 1837

» Chemistry » Sorting Materials into Groups

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Question

In chromatography filter paper act as

Choices

Choice (4) Response

a.

Stationary phase

b.

Phase

c.

Mobile phase

d.

Telephone phase

Question number: 1838

» Chemistry » Sorting Materials into Groups

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Question

Solid + liquid mixture can be.

Choices

Choice (4) Response

a.

Heterogeneous Mixture

b.

Homogeneous Mixture

c.

Both a. and b. are correct

d.

None of the above

Question number: 1839

» Chemistry » Air Around Us

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Question

Molecular formula of nitrogen is –

Choices

Choice (4) Response

a.

N4

b.

N3

c.

N2

d.

N

Question number: 1840

» Chemistry » Water

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Question

What happens when potassium gently dropped on the surface of cold water?

Choices

Choice (4) Response

a.

It floats

b.

It partially sinks

c.

It sinks

d.

It evaporates

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