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

Which factor is helping to reduce the environmental pollution

Question # 2

Atomospheric pollutant is

Question # 3

Chloroflurocarbon releases a chemical harmful to ozone

Question # 4

What is the cause of water pollution

Question # 5

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

Question # 6

Most hazardous metal pollutant of automobile exhaust is

Question # 7

Which gasses are produced from landfills

Question # 8

As it passes into food chain, the concentration of DDT

Question # 9

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

Question # 10

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

Question # 11

BOD is

Question # 12

A single chlorine free radical can destroy how many ozone molecules

Question # 13

DDT is

Question # 14

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 # 15

Photochemical smog is caused by

Question # 16

Chromium (VI) is highly toxic and can cause

Question # 17

Ozone hole refers to

Question # 18

In purification of potable water the coagulant used is

Question # 19

Oceans cove ______ percent of the surface of the earth

Question # 20

NO and NO2gases in atmosphere are represented by

Question # 21

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 # 22

SO2and NO2produce pollution by increasing

Question # 23

Chief air pollutant which is likely to deplete ozone layer

Question # 24

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 # 25

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

Question # 26

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

Question # 27

Water pollution is mainly due to

Question # 28

Spraying of DDT produces pollution of

Question # 29

Sulphur dioxide affects

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 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
2 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
3 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
4 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
5 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
6 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
7 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
8 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
9 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
10 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%

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