NSTSE (National Science Talent Search Exam- Unified Council) Class 6: Questions 1874 - 1881 of 2029

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Question number: 1874

» Chemistry » Water

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MCQ▾

Question

At what stage water is said to be supersaturated.

Choices

Choice (4) Response

a.

Gaseous

b.

More solute than its capacity

c.

Solid

d.

Question does not provide sufficient data or is vague

Question number: 1875

» Chemistry » Air Around Us

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MCQ▾

Question

Which of the following is a combustible gas?

Choices

Choice (4) Response

a.

Helium

b.

Carbon di-oxide

c.

Nitrogen

d.

Oxygen

Question number: 1876

» Chemistry » Sorting Materials into Groups

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MCQ▾

Question

In only one substance is obtained.

Choices

Choice (4) Response

a.

Evaporation

b.

Distillation

c.

None of the above

d.

All of the above

Question number: 1877

» Chemistry » Water

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

It sink

b.

It float

c.

It evaporates

d.

It partially sink

Question number: 1878

» Chemistry » Water

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

It evaporates

b.

It partially sink

c.

It sink

d.

It floats

Question number: 1879

» Chemistry » Water

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MCQ▾

Question

What happens when zinc is passed over heated and steam water?

Choices

Choice (4) Response

a.

Forms zinc hydroxide

b.

Liberate oxygen

c.

Forms zinc oxide

d.

None of the above

Question number: 1880

» Chemistry » Air Around Us

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MCQ▾

Question

How can you prevent air pollution?

Choices

Choice (4) Response

a.

By building tall chimneys

b.

By using internal combustion engines

c.

By deforestation

d.

All a. , b. and c. are correct

Question number: 1881

» Chemistry » Sorting Materials into Groups

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MCQ▾

Question

If we can see from one side of an object to the other side clearly then it is a ________material.

Choices

Choice (4) Response

a.

Translucent

b.

Magnetic

c.

Opaque

d.

None of the above

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