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

Drained sewage has B.O.D

Question # 2

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

Question # 3

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 # 4

Environmental pollution affects

Question # 5

Increased asthmatic attacks in certain seasons are related to

Question # 6

Carbon monoxide is pollutant as it

Question # 7

Which gas is not a constituent of atmosphere

Question # 8

Ozone hole is maximum over

Question # 9

Which of the following is not an air

Question # 10

A single chlorine free radical can destroy how many ozone molecules

Question # 11

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 # 12

In the atmosphere, O2is about

Question # 13

The normal amount of overhead ozone is about

Question # 14

Eutrophication causes reduction in

Question # 15

Which one of the following is not air pollutant gas

Question # 16

Ecosystem is a smaller unit of

Question # 17

BOD is

Question # 18

Ecology is a science of environment and deals specially with

Question # 19

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

Question # 20

The largest item which is recycled is

Question # 21

Which is not the condition for the formation of smog

Question # 22

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

Question # 23

Phosphate pollution is caused by

Question # 24

SO2Makes ______ acid rains

Question # 25

Which one is the most toxic?

Question # 26

The pH range of the acid rain is

Question # 27

Cyclone collector is used for minimizing

Question # 28

Pollution is

Question # 29

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 30

UV radiations bring about

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
2 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
3 Which is not a method for solid waste management
A. Landfill
B. Incinerating
C. Recycling
D. None of these
4 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
5 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
6 Ozone hole is maximum over
A. Europe
B. Antarctica
C. Asia
D. Africa
7 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
8 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
9 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
10 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above

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