ECAT Pre Engineering Chemistry Chapter 27 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

Try The MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

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ECAT Chemistry Chapter 27 Environmental Chemistry

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Question # 1

Which is not the condition for the formation of smog

Question # 2

Atmosphere of big/metropolitan cities is polluted most by

Question # 3

Carbon monoxide is harmful to human beings as it

Question # 4

Ozone hole refers to

Question # 5

Pollution is

Question # 6

Result of ozone hole is

Question # 7

Which one is not a pollutant normally?

Question # 8

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 9

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 10

A single chlorine free radical can destroy how many ozone molecules

Question # 11

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 12

BOD is

Question # 13

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 14

In Antarctica ozone depletion is due to the formation of following compound

Question # 15

Chief air pollutant which is likely to deplete ozone layer

Question # 16

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 17

Ecology is a science of environment and deals specially with

Question # 18

Classical smog occurs in palces of

Question # 19

Chloroflurocarbon releases a chemical harmful to ozone

Question # 20

Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water

Question # 21

B.O.D is connected with

Question # 22

Cyclone collector is used for minimizing

Question # 23

Environmental pollution affects

Question # 24

Water is often treated with chlorine to

Question # 25

The % of CO2is the atmosphere is

Question # 26

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 27

Most hazardous metal pollutant of automobile exhaust is

Question # 28

Ecosystem is a smaller unit of

Question # 29

Chromium (VI) is highly toxic and can cause

Question # 30

The pH of the rain water in areas where acid rain is the cause of pollution may be

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
2 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
3 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
4 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
5 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
6 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
7 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
8 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
9 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
10 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere

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