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

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 2

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 # 3

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

Question # 4

Which of the following human activities are contaminating surface and ground waters

Question # 5

Cyclone collector is used for minimizing

Question # 6

SO2and NO2produce pollution by increasing

Question # 7

What is the cause of water pollution

Question # 8

UV radiations bring about

Question # 9

The normal amount of overhead ozone is about

Question # 10

Burning of fossil fuels is the main source of pollution

Question # 11

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

Question # 12

Which one is not a pollutant normally?

Question # 13

Which causes water pollution?

Question # 14

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

Question # 15

Water is often treated with chlorine to

Question # 16

Which one is the most toxic?

Question # 17

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

Question # 18

Mottling of teeth is due to presence of an element in drinking water

Question # 19

The amount of Si in the lithosphere is about

Question # 20

Chromium (VI) is highly toxic and can cause

Question # 21

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

Question # 22

Spraying of DDT produces pollution of

Question # 23

Carbon monoxide is pollutant as it

Question # 24

Ecosystem is a smaller unit of

Question # 25

NO and NO2gases in atmosphere are represented by

Question # 26

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

Question # 27

Chromium (VI) is highly toxic and can cause

Question # 28

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

Question # 29

Which of the following is not an air

Question # 30

Which one of the following is not air pollutant gas

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
3 Pollution is
A. Removal of top soill
B. Release of toxic/undesirable materials in enevironment
C. Conversation of energy
D. All the above
4 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these
5 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
6 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
7 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
8 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
9 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
10 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles

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