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

In the atmosphere, CO2is about

Question # 2

Pick up the correct statement

Question # 3

Chief source of water and soil pollution is

Question # 4

In purification of potable water the coagulant used is

Question # 5

Potable water is considered to be

Question # 6

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 # 7

Burning of fossil fuels is the main source of pollution

Question # 8

Photochemical smog is caused by

Question # 9

Domestic waste mostly constitutes

Question # 10

Biodegradable pollutant is

Question # 11

Phosphate pollution is caused by

Question # 12

Which is not a component of environment

Question # 13

Which causes water pollution?

Question # 14

The pH range of the acid rain is

Question # 15

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

Question # 16

Chromium (VI) is highly toxic and can cause

Question # 17

DDT is

Question # 18

Water pollution is mainly due to

Question # 19

Which of the following human activities are contaminating surface and ground waters

Question # 20

The % of CO2is the atmosphere is

Question # 21

Chloroflurocarbon releases a chemical harmful to ozone

Question # 22

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

Question # 23

Air pollution is not caused by

Question # 24

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

Question # 25

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 # 26

BOD is

Question # 27

Polycyolic aromatic hydrocarbons are taught to be

Question # 28

Minamata disease is due to pollution of

Question # 29

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 30

In the atmosphere, O2is about

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
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
A. Iodine
B. Bromine
C. Lead
D. Carbon
2 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
3 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
4 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
5 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
6 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
7 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
8 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
9 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
10 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above

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