Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 171 - 178 of 209

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Question 171

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Question

MCQ▾

Which of the following can be dissolve rapidly in haemoglobin of blood than oxygen?

Choices

Choice (4)Response

a.

Nitrous oxide

b.

Carbon monoxide

c.

Ozone

d.

Sulphur dioxide

Question 172

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Question

MCQ▾

The of acid rain water less than?

Choices

Choice (4)Response

a.

3.1

b.

5

c.

1.2

d.

6

Question 173

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Question

MCQ▾

Which of the following is known as “Styron”?

Choices

Choice (4)Response

a.

Polyethylene

b.

Polystyrene

c.

Teflon

d.

Polypropylene

Question 174

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Question

MCQ▾

Smog consists of?

Choices

Choice (4)Response

a.

Water and smoke

b.

Air and water

c.

Water & fire

d.

Smoke & fog

Question 175

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Question

MCQ▾

Which of the following products can’t be decomposed easily?

Choices

Choice (4)Response

a.

Polyethene

b.

Acrylic

c.

Plastic

d.

All a. , b. and c. are correct

Question 176

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Question

MCQ▾

Which of the following type of nylon is known as “Perlon-L”?

Choices

Choice (4)Response

a.

Nylon-6,6

b.

Nylon-6

c.

Nylon-5

d.

None of the above

Question 177

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Question

MCQ▾

Which of the following part of sheep is used to produce wool?

Choices

Choice (4)Response

a.

Fleece

b.

Skin

c.

Toes

d.

Question does not provide sufficient data or is vague

Question 178

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Question

MCQ▾

Select the materials that can be recycled?

(I) Old newspaper

(II) Aluminium tin cans

(III) Plastic

Choices

Choice (4)Response

a.

I, II and III only

b.

I and II only

c.

I and III only

d.

I only