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

Ozone hole is maximum over

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

Chief source of water and soil pollution is

Question # 4

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

Question # 5

Burning of fossil fuels is the main source of pollution

Question # 6

Biodegradable pollutant is

Question # 7

The amount of Si in the lithosphere is about

Question # 8

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 # 9

Oceans cove ______ percent of the surface of the earth

Question # 10

Drained sewage has B.O.D

Question # 11

Which heavy metals do not have any safe limits

Question # 12

Acid rains are produced by

Question # 13

The normal amount of overhead ozone is about

Question # 14

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

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

B.O.D is connected with

Question # 17

Pollution is

Question # 18

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

Question # 19

Which is not a method for solid waste management

Question # 20

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

Question # 21

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 22

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 23

DDT is

Question # 24

Cyclone collector is used for minimizing

Question # 25

Exposure to CO results in

Question # 26

Which of the following is not an air

Question # 27

UV radiations bring about

Question # 28

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

Question # 29

Atmosphere of big/metropolitan cities is polluted most by

Question # 30

Potable water is considered to be

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
2 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
3 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
4 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
5 Sulphur dioxide affects
A. Cell wall
B. Plasmodesmata
C. All membrane systems
D. Nucleus
6 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above
7 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers
8 Soil remediation means
A. To make it suitable for cultivation of crops
B. To make it acidic
C. To make it alkeline
D. To add manure into it
9 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
10 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides

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