NSTSE (National Science Talent Search Exam- Unified Council) Class 6: Questions 1718 - 1725 of 2029

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Question number: 1718

» Chemistry » Sorting Materials into Groups

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Question

Which of the following is a heterogeneous mixture?

Choices

Choice (4) Response

a.

Sand and petrol

b.

Sand and water

c.

Cough syrup

d.

Both a. and b. are correct

Question number: 1719

» Chemistry » Sorting Materials into Groups

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Question

Which of the following metals are lustrous?

Choices

Choice (4) Response

a.

Mercury

b.

Silver

c.

Gold

d.

All a. , b. and c. are correct

Question number: 1720

» Chemistry » Water

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MCQ▾

Question

Water has definite physical constants i. e. ?

Choices

Choice (4) Response

a.

Freezing Point

b.

Boiling Point

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question number: 1721

» Chemistry » Water

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MCQ▾

Question

Which of the following is the water’s chemical formula?

Choices

Choice (4) Response

a.

H2SO4

b.

HCL

c.

H3O+

d.

H2O

Question number: 1722

» Chemistry » Water

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MCQ▾

Question

What happens when magnesium reacts with boiling water?

Choices

Choice (4) Response

a.

Intense green light produce

b.

Intense blue light produce

c.

Intense white light produce

d.

Question does not provide sufficient data or is vague

Question number: 1723

» Chemistry » Air Around Us

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MCQ▾

Question

In Nitrogen the two N atoms are combines together using.

Choices

Choice (4) Response

a.

Three single covalent bonds

b.

Triple covalent bonds

c.

Three triple covalent bonds

d.

Three single ionic bonds

Question number: 1724

» Chemistry » Water

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MCQ▾

Question

If 5gm of CaCO3 added to 95gm of water the concentration will be

Choices

Choice (4) Response

a.

5%

b.

90%

c.

8%

d.

95%

Question number: 1725

» Chemistry » Sorting Materials into Groups

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MCQ▾

Question

Which method is used to separate liquid- liquid mixture?

Choices

Choice (4) Response

a.

Decantation

b.

Filtration

c.

Separating funnel

d.

Sieving

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