NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 2014 - 2020 of 2028

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Question number: 2014

» Chemistry » Pollution of Air and Water

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Question

Sewage water can be purified by the recycling action of?

Choices

Choice (4) Response

a.

Non-biodegradable chemicals

b.

Fish

c.

Micro organising

d.

Fuels

Question number: 2015

» Chemistry » Pollution of Air and Water

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Question

What is meant by conserving the environment?

Choices

Choice (4) Response

a.

Changing natural resources from its original state

b.

Preserving the condition of the nature than has been destroyed

c.

Not lowering the quality of the environment

d.

Not destroying natural resources

Question number: 2016

» Chemistry » Pollution of Air and Water

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MCQ▾

Question

Which of the following is major source of the pollutant chlorofluorocarbons?

Choices

Choice (4) Response

a.

Industrial effluents

b.

Aerosols

c.

Sewage pollutants

d.

None of the above

Question number: 2017

» Chemistry » Pollution of Air and Water

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Question

Which are the primary constituents of photo chemical smog?

Choices

Choice (4) Response

a.

Hydrocarbons & CFCs.

b.

And

c.

and hydrocarbons

d.

Question number: 2018

» Chemistry » Synthetic Fibers and Plastics

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Question

The process in which threads from cocoon are taking out in called or known as?

Choices

Choice (4) Response

a.

Reeling

b.

Rearing

c.

Sorting

d.

Scouring

Question number: 2019

» Chemistry » Pollution of Air and Water

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MCQ▾

Question

Electrical disturbances in the atmosphere (troposphere) initiates reactions between nitrogen and?

Choices

Choice (4) Response

a.

Water vapour

b.

Oxygen & water

c.

Sulphur

d.

All of the above

Question number: 2020

» Chemistry » Pollution of Air and Water

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MCQ▾

Question

What are the exhausting gases from automobile vehicles?

(I) Carbon dioxide

(II) Sulphur dioxide

(III) Oxides of nitrogen

Choices

Choice (4) Response

a.

I and II only

b.

I & III only

c.

II, and III only

d.

I, II, III

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