Introduction of Environmental Science (CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III)): Questions 36 - 40 of 41

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Question number: 36

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

Appeared in Year: 2009

MCQ▾

Question

Doppler effect is not commonly observed using light, because: (June)

Choices

Choice (4) Response

a.

Object has to be moving at a speed that is a significant fraction of the speed of light.

b.

Sound is audible

c.

Velocity of sound is much smaller than that of light

d.

Light is an electromagnetic wave

Question number: 37

» Introduction of Environmental Science » Structure and Composition of Atmosphere

Appeared in Year: 2009

MCQ▾

Question

One of the important mechanism of aerosol formation is: (June)

Choices

Choice (4) Response

a.

Nucleation from vapour molecules

b.

Breakdown of nimbus clouds

c.

Cracking of ionosphere

d.

Precipitation in local ponds

Question number: 38

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

Appeared in Year: 2009

MCQ▾

Question

A cyclist starting from stand still accelerates at 0.4 msec2 for 10 seconds.

(a) What velocity does it reach and

(b) the distance it covers: (June)

Choices

Choice (4) Response

a.

(a) 2msec1 (b) 20m

b.

(a) 4msec1 (b) 20m

c.

(a) 4msec1 (b) 10m

d.

(a) 2msec1 (b) 10m

Question number: 39

» 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: 40

» 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

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