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

Atomospheric pollutant is

Question # 2

Exposure to CO results in

Question # 3

Which gasses are produced from landfills

Question # 4

Drawback DDT as presticide is

Question # 5

Acid rains are produced by

Question # 6

Polycyolic aromatic hydrocarbons are taught to be

Question # 7

The region of earth capable of supporting life is

Question # 8

Chromium (VI) is highly toxic and can cause

Question # 9

Minamata disease is due to pollution of

Question # 10

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

Question # 11

Which of the following is not an air

Question # 12

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

Question # 13

Photochemical smog is caused by

Question # 14

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

Question # 15

The amount of Si in the lithosphere is about

Question # 16

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

Question # 17

Soil salinity can be measured by

Question # 18

Classical smog occurs in palces of

Question # 19

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 # 20

A pollutant affects

Question # 21

Atmosphere of big/metropolitan cities is polluted most by

Question # 22

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 # 23

Soil remediation means

Question # 24

Ozone depletion in stratosphere shall result in

Question # 25

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

Question # 26

Eutrophication causes reduction in

Question # 27

Burning of fossil fuels is the main source of pollution

Question # 28

Which is not the affect of polluted air on environment

Question # 29

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 # 30

Which is not the condition for the formation of smog

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
3 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
4 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
5 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
6 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
7 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
8 Carbon monoxide is harmful to human beings as it
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3
9 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
10 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles

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