Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 164 - 170 of 209

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Question number: 164

» 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: 165

» 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: 166

» 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: 167

» 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: 168

» Chemistry » Pollution of Air and Water

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MCQ▾

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: 169

» Chemistry » Pollution of Air and Water

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MCQ▾

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

Question number: 170

» Chemistry » Pollution of Air and Water

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MCQ▾

Question

Which of the following can cause water pollution if the farmer use in excess in fields?

Choices

Choice (4)Response

a.

Manures and water

b.

Fertilizers and pesticides

c.

Seeds and fertilizers

d.

Pesticides and seeds

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