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

00:00
Question # 1

When chlorofluoro carbon are subjected to U.V. they form

Question # 2

Which factor is helping to reduce the environmental pollution

Question # 3

Environmental pollution affects

Question # 4

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 5

Which step is unnecessary for purification of water for drinking purposes

Question # 6

A single chlorine free radical can destroy how many ozone molecules

Question # 7

Polycyolic aromatic hydrocarbons are taught to be

Question # 8

Photochemical smog is caused by

Question # 9

A pollutant affects

Question # 10

Which gas is not a constituent of atmosphere

Question # 11

The pH range of the acid rain is

Question # 12

Ozone hole refers to

Question # 13

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 # 14

Soil remediation means

Question # 15

Minamata disease is due to pollution of

Question # 16

Which one is the major reason for pollution in high cities?

Question # 17

Chief source of water and soil pollution is

Question # 18

BOD is

Question # 19

Depletion of ozone layer is due to

Question # 20

In the atmosphere, O2is about

Question # 21

Drained sewage has B.O.D

Question # 22

Ozone hole is maximum over

Question # 23

As it passes into food chain, the concentration of DDT

Question # 24

Most hazardous metal pollutant of automobile exhaust is

Question # 25

Which one is not a pollutant normally?

Question # 26

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

Question # 27

Acid rains are produced by

Question # 28

Eutrophication causes reduction in

Question # 29

Biodegradable pollutant is

Question # 30

Which is not a method for solid waste management

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
2 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
3 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
4 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
5 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
6 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
7 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
8 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
9 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
10 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm

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