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

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

Question # 2

Swage water is purified by

Question # 3

Cyclone collector is used for minimizing

Question # 4

In incinerating the waste is burnt at

Question # 5

Increasing skin cancer and high mutation rate are due to

Question # 6

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 7

Classical smog occurs in palces of

Question # 8

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 9

Shahi Qilla may be destroyed by

Question # 10

Which is not the affect of polluted air on environment

Question # 11

DDT is

Question # 12

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 13

Chromium (VI) is highly toxic and can cause

Question # 14

In the atmosphere, O2is about

Question # 15

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 16

Which is not the condition for the formation of smog

Question # 17

Chromium (VI) is highly toxic and can cause

Question # 18

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 19

What is the cause of water pollution

Question # 20

B.O.D is connected with

Question # 21

Ecosystem is a smaller unit of

Question # 22

A single chlorine free radical can destroy how many ozone molecules

Question # 23

Which is not a method for solid waste management

Question # 24

As it passes into food chain, the concentration of DDT

Question # 25

Ultraviolet radiation from sun causes a reaction that produces

Question # 26

Chief source of water and soil pollution is

Question # 27

Chloroflurocarbon releases a chemical harmful to ozone

Question # 28

BOD is

Question # 29

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 30

Spraying of DDT produces pollution of

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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 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
3 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
4 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
5 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
6 One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
7 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
8 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
9 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
10 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000

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