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

A single chlorine free radical can destroy how many ozone molecules

Question # 2

Phosphate pollution is caused by

Question # 3

Potable water is considered to be

Question # 4

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

Question # 5

Ozone hole refers to

Question # 6

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

Question # 7

The pH range of the acid rain is

Question # 8

What is the cause of water pollution

Question # 9

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 10

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

Question # 11

Which one of the following is not air pollutant gas

Question # 12

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

Question # 13

Which is not the condition for the formation of smog

Question # 14

Increased asthmatic attacks in certain seasons are related to

Question # 15

Chloroflurocarbon releases a chemical harmful to ozone

Question # 16

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 # 17

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 # 18

In the atmosphere, O2is about

Question # 19

Sulphur dioxide affects

Question # 20

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 21

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 22

Carbon monoxide is pollutant as it

Question # 23

Increasing skin cancer and high mutation rate are due to

Question # 24

As it passes into food chain, the concentration of DDT

Question # 25

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

Question # 26

Most hazardous metal pollutant of automobile exhaust is

Question # 27

Which is not a method for solid waste management

Question # 28

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 29

The amount of Si in the lithosphere is about

Question # 30

Ozone layer of stratosphere requires protection from indiscriminate use of

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
3 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
4 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
5 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
6 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
7 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
8 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
9 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
10 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above

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