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

Biodegradable pollutant is

Question # 2

Polycyolic aromatic hydrocarbons are taught to be

Question # 3

Chromium (VI) is highly toxic and can cause

Question # 4

Result of ozone hole is

Question # 5

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

Question # 6

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

Question # 7

Environmental pollution affects

Question # 8

Pollution is

Question # 9

Acid rain is due to increase in atmospheric concentration of

Question # 10

The film forming components of paints are

Question # 11

Which is not the condition for the formation of smog

Question # 12

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 13

Spraying of DDT produces pollution of

Question # 14

Drained sewage has B.O.D

Question # 15

Eutrophication causes reduction in

Question # 16

Which of the following is not an air

Question # 17

The largest item which is recycled is

Question # 18

In the atmosphere, CO2is about

Question # 19

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 # 20

The pH range of the acid rain is

Question # 21

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 22

Soil salinity can be measured by

Question # 23

Which is not the affect of polluted air on environment

Question # 24

Most hazardous metal pollutant of automobile exhaust is

Question # 25

A pollutant affects

Question # 26

Ultraviolet radiation from sun causes a reaction that produces

Question # 27

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

Question # 28

NO and NO2gases in atmosphere are represented by

Question # 29

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 30

Which one is not a pollutant normally?

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
3 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
4 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
5 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
6 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
7 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
8 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
9 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
10 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil

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