NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1995 - 2000 of 2028

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Question number: 1995

» Chemistry » Pollution of Air and Water

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Question

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

Question number: 1996

» Chemistry » Pollution of Air and Water

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MCQ▾

Question

Ozone hole refers to?

Choices

Choice (4) Response

a.

Hole in ozone layer

b.

Reduction in the thickness of ozone layer in troposphere

c.

Reduction in the thickness of ozone layer in stratosphere

d.

Increased concentration of ozone

Question number: 1997

» Chemistry » Pollution of Air and Water

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Question

Presence of lead is considered as?

Choices

Choice (4) Response

a.

Air Pollutant

b.

Soil pollutant

c.

Water pollutant

d.

All of the above

Question number: 1998

» Chemistry » Pollution of Air and Water

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Question

Which of the following methods can be used to reduce the pollution emitted by burning of fossil fuels?

(I) Using an incinerate

(II) Using renewable energy

(II) Fixing catalytic converters in vehicles

Choices

Choice (4) Response

a.

I, II and III only

b.

I only

c.

I & III only

d.

II & III only

Question number: 1999

» Chemistry » Pollution of Air and Water

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MCQ▾

Question

Which of the following part of atmosphere ozone layer is present?

Choices

Choice (4) Response

a.

Thermosphere

b.

Troposphere

c.

Mesosphere

d.

Stratosphere

Question number: 2000

» Chemistry » Synthetic Fibers and Plastics

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MCQ▾

Question

Which one of the following is the processes that in involved in production of Polyethene?

Choices

Choice (4) Response

a.

Hydrogenation

b.

Polymerisation

c.

Isomerisation

d.

All of the above

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