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

Fungicides are the pesticides which

Question # 3

Polycyolic aromatic hydrocarbons are taught to be

Question # 4

Increasing skin cancer and high mutation rate are due to

Question # 5

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 6

Carbon monoxide is pollutant as it

Question # 7

Which is not the affect of polluted air on environment

Question # 8

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 9

Increased asthmatic attacks in certain seasons are related to

Question # 10

SO2Makes ______ acid rains

Question # 11

Cyclone collector is used for minimizing

Question # 12

Which one is not a pollutant normally?

Question # 13

Chromium (VI) is highly toxic and can cause

Question # 14

Drawback DDT as presticide is

Question # 15

The normal amount of overhead ozone is about

Question # 16

The amount of oxygen in the lithosphere is about

Question # 17

Soil salinity can be measured by

Question # 18

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 19

Which gas is not a constituent of atmosphere

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

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

Question # 22

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 # 23

Soil remediation means

Question # 24

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

Question # 25

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

Question # 26

Depletion of ozone layer is due to

Question # 27

Phosphate pollution is caused by

Question # 28

Biodegradable pollutant is

Question # 29

Which one of the following is not air pollutant gas

Question # 30

Which heavy metals do not have any safe limits

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
2 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
3 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
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 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
6 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
7 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
8 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
9 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
10 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

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