CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III): Questions 370 - 374 of 376

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Question number: 370

» Introduction of Environmental Science » Laws of Thermodynamics

Appeared in Year: 2009

MCQ▾

Question

The law of conservation of energy is described by:

Choices

Choice (4) Response
a.

Third law of thermodynamics

b.

First law of thermodynamics

c.

Second law of thermodynamics

d.

Zeroth law of thermodynamics

Question number: 371

» Air » Sources of Pollution

Appeared in Year: 2009

MCQ▾

Question

Electromagnetic pollution is caused by: (June)

Choices

Choice (4) Response
a.

Mobile phones

b.

Vehicular traffic

c.

Aircraft noise

d.

Lightning and thunderstorms

Question number: 372

» Introduction of Environmental Science » Physico-Chemical and Biological Factors in Environment

Appeared in Year: 2009

MCQ▾

Question

As per temperature of an n-type semiconductor increases, the number of hole: (June)

Choices

Choice (4) Response
a.

Does not change but the number of electrons increases

b.

Decreases but the number of electrons increases

c.

Increases but the number of electrons does not change

d.

Increases but the number the electrons decreases

Question number: 373

» Water Chemistry » Chemistry of Water

Appeared in Year: 2009

MCQ▾

Question

pH of sea water is about: (June)

Choices

Choice (4) Response
a.

9.2

b.

6.0

c.

7.0

d.

8.0

Question number: 374

» Introduction of Environmental Science » Pressure, Temperature, Precipitation, Humidity, Radiation and Wind

Appeared in Year: 2009

MCQ▾

Question

The relationship between pressure ( ρ ), velocity (v) and height (h), is given by Bernoulli’s equation: (June)

Choices

Choice (4) Response
a.

ρ+12ρv2+12ρgh=constant

b.

ρ+12ρv2+ρgh=constant

c.

ρ+12ρv2ρgh=constant

d.

ρ+12ρv2+2ρgh=constant

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