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

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 # 2

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

Question # 3

Which one of the following is not air pollutant gas

Question # 4

Increased asthmatic attacks in certain seasons are related to

Question # 5

In purification of potable water the coagulant used is

Question # 6

Drained sewage has B.O.D

Question # 7

Ecosystem is a smaller unit of

Question # 8

Water is often treated with chlorine to

Question # 9

Which step is unnecessary for purification of water for drinking purposes

Question # 10

Carbon monoxide is harmful to human beings as it

Question # 11

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

Question # 12

Polycyolic aromatic hydrocarbons are taught to be

Question # 13

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 14

Which of the following waste material is not recycled for use again

Question # 15

The % of CO2is the atmosphere is

Question # 16

Which gasses are produced from landfills

Question # 17

Potable water is considered to be

Question # 18

Drawback DDT as presticide is

Question # 19

Which of the following is not an air

Question # 20

Which is not the condition for the formation of smog

Question # 21

NO and NO2gases in atmosphere are represented by

Question # 22

BOD is

Question # 23

Ozone hole is maximum over

Question # 24

Phosphate pollution is caused by

Question # 25

Atmosphere of big/metropolitan cities is polluted most by

Question # 26

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 # 27

Pick up the correct statement

Question # 28

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 29

Sulphur dioxide affects

Question # 30

Domestic waste mostly constitutes

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
2 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
3 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
4 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
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 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
7 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
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 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
10 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+

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