Science-Class-8 NCERT (NCERT Based General Studies (GS)): Questions 387 - 393 of 468

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Question number: 387

» Science » Class-8 NCERT » Pollution of Air and Water (Air Pollution)

MCQ▾

Question

Man-Made resources which lead to air pollution are:

Choices

Choice (4) Response
a.

Industrialization

b.

Overpopulation, deforestation

c.

Urbanization

d. All a. , b. and c. are correct

Question number: 388

» Science » Class-8 NCERT » Pollution of Air and Water (Water Pollution)

MCQ▾

Question

Water treatment process can be categorized as:

Choices

Choice (4) Response
a.

Domestic water treatment

b.

Industrial water treatment

c. Both a. and b. are correct
d. Question does not provide sufficient data or is vague

Question number: 389

» Science » Class-8 NCERT » Light (Reflections)

MCQ▾

Question

Periscope is defined as:

Choices

Choice (4) Response
a.

Right-left reversal of image by a plane mirror

b.

An instrument used to see above obstacles

c.

An arrangement in which beautiful patterns are formed

d. All of the above

Question number: 390

» Science » Class-8 NCERT » Pollution of Air and Water (Air Pollution)

MCQ▾

Question

Green House Gases are:

Choices

Choice (4) Response
a.

Water Vapours, Methane

b.

Carbon dioxide, nitrogen oxide

c.

Ozone

d. All a. , b. and c. are correct

Question number: 391

» Science » Class-8 NCERT » Pollution of Air and Water (Air Pollution)

MCQ▾

Question

Increasing levels of Green House gases like Co2 are leading to:

Choices

Choice (4) Response
a.

Air Pollution

b.

Global warming

c.

Green House effect

d. All of the above

Question number: 392

» Science » Class-8 NCERT » Pollution of Air and Water (Air Pollution)

MCQ▾

Question

Pollutant used in refrigerators, air conditioners and aerosol sprays is

Choices

Choice (4) Response
a.

Oxides of nitrogen

b.

Methane

c.

CFC’s

d. All of the above

Question number: 393

» Science » Class-8 NCERT » Light (Concept of Light)

MCQ▾

Question

The bouncing back of the light after striking a polished surface is called as:

Choices

Choice (4) Response
a.

Reflected ray

b.

Reflection of light

c.

Incident ray

d. Question does not provide sufficient data or is vague

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