NSTSE (National Science Talent Search Exam- Unified Council) Class 6: Questions 1750 - 1757 of 2029

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Question number: 1750

» Chemistry » Sorting Materials into Groups

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Question

When solid directly changes to vapour it are known as

Choices

Choice (4) Response

a.

Evaporation

b.

Sublimation

c.

Filtration

d.

Sedimentation

Question number: 1751

» Chemistry » Water

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Question

In how many states water exist?

Choices

Choice (4) Response

a.

Four

b.

Three

c.

Two

d.

One

Question number: 1752

» Chemistry » Water

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Question

Why pure water is not a conductor of electricity?

Choices

Choice (4) Response

a.

Absent of impurities

b.

Absent of Sulphur

c.

All of the above

d.

None of the above

Question number: 1753

» Chemistry » Water

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Question

What happens when Aluminium react with boiled water?

Choices

Choice (4) Response

a.

Forms Al2H3

b.

Liberate oxygen

c.

Liberate hydrogen

d.

All of the above

Question number: 1754

» Chemistry » Sorting Materials into Groups

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Question

A heterogeneous mixture is

Choices

Choice (4) Response

a.

Made up of only one kind of atoms

b.

A solid –liquid mixture

c.

A gas – liquid mixture

d.

Made up of different kind of atom

Question number: 1755

» Chemistry » Sorting Materials into Groups

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Question

We separate mixture to remove.

Choices

Choice (4) Response

a.

Useful Substance

b.

Harmful Substance

c.

Undesirable substance

d.

Both b. and c. are correct

Question number: 1756

» Chemistry » Water

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Question

Complete the following reaction

3Fe + 4H2O → + 4H2

Choices

Choice (4) Response

a.

Fe3O4

b.

Fe2O3

c.

Fe3 (OH) 2

d.

Fe3O5

Question number: 1757

» Chemistry » Air Around Us

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Question

In filament bulbs there’s a gas ‘Y’ is present to increase its lifetime. So the gas is ________ gas.

Choices

Choice (4) Response

a.

Oxygen

b.

Argon

c.

Neon

d.

Carbon di-oxide

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