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

What is the cause of water pollution

Question # 2

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

Question # 3

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

Question # 4

NO and NO2gases in atmosphere are represented by

Question # 5

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 # 6

Sulphur dioxide affects

Question # 7

In Antarctica ozone depletion is due to the formation of following compound

Question # 8

B.O.D is connected with

Question # 9

Drained sewage has B.O.D

Question # 10

The normal amount of overhead ozone is about

Question # 11

The amount of Si in the lithosphere is about

Question # 12

Biodegradable pollutant is

Question # 13

Polycyolic aromatic hydrocarbons are taught to be

Question # 14

Eutrophication causes reduction in

Question # 15

Burning of fossil fuels is the main source of pollution

Question # 16

In purification of potable water the coagulant used is

Question # 17

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

Question # 18

Atmosphere of big/metropolitan cities is polluted most by

Question # 19

Which one of the following is not air pollutant gas

Question # 20

Which one is not a pollutant normally?

Question # 21

The region of earth capable of supporting life is

Question # 22

In the atmosphere, O2is about

Question # 23

Phosphate pollution is caused by

Question # 24

Carbon monoxide is pollutant as it

Question # 25

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 26

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 27

A single chlorine free radical can destroy how many ozone molecules

Question # 28

BOD is

Question # 29

The % of CO2is the atmosphere is

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
2 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
3 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
4 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
5 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
6 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
7 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
8 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
9 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due
A. Combining with oxygen to form carbon dioxide
B. Destruction of hemoglobin
C. Preventing reaction between oxygen and hemoglobin
D. Forming stable compound with hemoglobin
10 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie

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