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

Fungicides are the pesticides which

Question # 2

The % of CO2is the atmosphere is

Question # 3

UV radiations bring about

Question # 4

Which one is the most toxic?

Question # 5

DDT is

Question # 6

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

Question # 7

Cyclone collector is used for minimizing

Question # 8

Oceans cove ______ percent of the surface of the earth

Question # 9

Biodegradable pollutant is

Question # 10

Shahi Qilla may be destroyed by

Question # 11

Swage water is purified by

Question # 12

Carbon monoxide is harmful to human beings as it

Question # 13

Which one of the following is not air pollutant gas

Question # 14

B.O.D is connected with

Question # 15

Which heavy metals do not have any safe limits

Question # 16

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

Question # 17

Which step is unnecessary for purification of water for drinking purposes

Question # 18

Which causes water pollution?

Question # 19

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 20

BOD is

Question # 21

Chief source of water and soil pollution is

Question # 22

Environmental pollution affects

Question # 23

Ozone depletion in stratosphere shall result in

Question # 24

Increasing skin cancer and high mutation rate are due to

Question # 25

Atomospheric pollutant is

Question # 26

Soil salinity can be measured by

Question # 27

SO2and NO2produce pollution by increasing

Question # 28

Domestic waste mostly constitutes

Question # 29

Depletion of ozone layer is due to

Question # 30

Chloroflurocarbon releases a chemical harmful to ozone

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
2 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
3 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
A. Iodine
B. Bromine
C. Lead
D. Carbon
4 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
5 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
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 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
8 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
9 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
10 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these

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