NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1979 - 1986 of 2028

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Question number: 1979

» Chemistry » Synthetic Fibers and Plastics

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Question

Name the two processes of making fabrics?

Choices

Choice (4) Response

a.

Ginning and weaving

b.

Weaving and knitting

c.

Weaving and spinning

d.

None of the above

Question number: 1980

» Chemistry » Synthetic Fibers and Plastics

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Question

Ziegler – Natta catalyst is used in the preparation of?

Choices

Choice (4) Response

a.

PVC

b.

High density Polyethene

c.

Dacron

d.

Low density polythene

Question number: 1981

» Chemistry » Pollution of Air and Water

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Question

Which of the following system will damage by the over exposure to ultraviolet rays?

Choices

Choice (4) Response

a.

Immune system

b.

Nervous system

c.

Digestive system

d.

Skeletal system

Question number: 1982

» Chemistry » Pollution of Air and Water

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Question

The pollutants released by jet aeroplanes in the atmosphere as fluorocarbons are called?

Choices

Choice (4) Response

a.

Photochemical reductants

b.

Aerosols

c.

Physical pollutants.

d.

Photochemical oxidants

Question number: 1983

» Chemistry » Synthetic Fibers and Plastics

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Question

Which of the following polymer is used is manufacture of paints?

Choices

Choice (4) Response

a.

Melamine

b.

Dacron

c.

Novalac

d.

Glyptal

Question number: 1984

» Chemistry » Pollution of Air and Water

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Question

Select one from following which is not an air pollution?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1985

» Chemistry » Pollution of Air and Water

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Question

The loss or reduction of chlorophyll in the leaves in termed?

Choices

Choice (4) Response

a.

Epinarty

b.

Lichen

c.

Necrosis

d.

Chlorosis

Question number: 1986

» Chemistry » Pollution of Air and Water

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Question

Fluorosis, is a bone disease caused by the presence of?

Choices

Choice (4) Response

a.

Pesticides in water

b.

Fluorides in water

c.

Sulphur dioxide in air

d.

Carbon monoxide in air

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