Science (NCERT Based General Studies (GS)): Questions 426 - 431 of 1207

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Question number: 426

» Science » Class-8 NCERT » Light (Laws of Reflection)

MCQ▾

Question

The angle between the normal and incident ray is called as:

Choices

Choice (4) Response

a.

Angle of incidence

b.

Perpendicular

c.

Angle of reflection

d.

Question does not provide sufficient data or is vague

Question number: 427

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

MCQ▾

Question

The substances which contaminate the air are called as:

Choices

Choice (4) Response

a.

Air pollutants

b.

Dust particles, Smoke and carbon monoxide

c.

Volcanic activities

d.

Methane, Radon gas

Question number: 428

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

MCQ▾

Question

Smog is the combination of the:

Choices

Choice (4) Response

a.

Smoke and fog

b.

Smoke and carbon monoxide

c.

Rain mixed with sulphur dioxide and nitrogen dioxide

d.

Pollution caused by chemicals

Question number: 429

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

MCQ▾

Question

Efforts made to reduce pollution from mobile sources include:

Choices

Choice (4) Response

a.

Using smokeless sources of energy

AND

Plantation of new trees

b.

Use of electrostatic precipitator

c.

Automobiles use should be lessened

d.

All a. , b. and c. are correct

Question number: 430

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

MCQ▾

Question

Water which is suitable for drinking is called as:

Choices

Choice (4) Response

a.

Chlorinated water

b.

Impure water

c.

Boiled water

d.

Potable water

Question number: 431

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

MCQ▾

Question

Water pollution can be reduced by:

Choices

Choice (4) Response

a.

Use environmentally friendly household products

AND

Apply natural pesticides and fertilizers

b.

Dispose of toxic products with care

AND

Use of less water

c.

Don’t litter

d.

All a. , b. and c. are correct

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