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

Atmosphere of big/metropolitan cities is polluted most by

Question # 2

Drawback DDT as presticide is

Question # 3

Which step is unnecessary for purification of water for drinking purposes

Question # 4

Ecosystem is a smaller unit of

Question # 5

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

Question # 6

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 7

BOD is

Question # 8

Ecology is a science of environment and deals specially with

Question # 9

NO and NO2gases in atmosphere are represented by

Question # 10

Sulphur dioxide affects

Question # 11

Which gas is not a constituent of atmosphere

Question # 12

Air pollution is not caused by

Question # 13

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

Question # 14

Which is not a component of environment

Question # 15

Shahi Qilla may be destroyed by

Question # 16

B.O.D is connected with

Question # 17

Carbon monoxide is pollutant as it

Question # 18

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 # 19

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

Question # 20

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 # 21

Acid rains are produced by

Question # 22

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 23

Fungicides are the pesticides which

Question # 24

Chief source of water and soil pollution is

Question # 25

The amount of Si in the lithosphere is about

Question # 26

The normal amount of overhead ozone is about

Question # 27

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

Question # 28

In the atmosphere, CO2is about

Question # 29

Swage water is purified by

Question # 30

Water which his considered to be safe for human consumption is known as

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
2 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
3 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
4 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
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 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
7 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
8 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
9 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
10 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these

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