NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 2012 - 2016 of 2028

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Question 2012

Question

MCQ▾

Which one is not a correct statement?

Choices

Choice (4)Response

a.

Primary pollutants are those which are emitted directly from the source

b.

Particulates refer to all atmospheric substances that are not gases.

c.

Secondary pollutants are those which are formed in the atmosphere by chemical interactions among primary pollutants and atmospheric constituents

d.

Acidrain is primary pollutant

Question 2013

Question

MCQ▾

Which of the following is a source of lead particles in atmosphere?

Choices

Choice (4)Response

a.

Petrol in automobiles

b.

Coal in thermal power stations

c.

Biomass in chullahs

d.

LPG for cooking

Question 2014

Question

MCQ▾

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 2015

Question

MCQ▾

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 2016

Question

MCQ▾

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

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