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

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Question # 1

Eutrophication causes reduction in

Question # 2

Depletion of ozone layer is due to

Question # 3

Water is often treated with chlorine to

Question # 4

B.O.D is connected with

Question # 5

Ecology is a science of environment and deals specially with

Question # 6

Soil salinity can be measured by

Question # 7

Which is not a component of environment

Question # 8

Atmosphere of big/metropolitan cities is polluted most by

Question # 9

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 # 10

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 11

Which is not a method for solid waste management

Question # 12

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

Question # 13

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 14

Drained sewage has B.O.D

Question # 15

NO and NO2gases in atmosphere are represented by

Question # 16

Environmental pollution affects

Question # 17

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

Question # 18

Minamata disease is due to pollution of

Question # 19

Which of the following is not an air

Question # 20

Polycyolic aromatic hydrocarbons are taught to be

Question # 21

Acid rain is due to increase in atmospheric concentration of

Question # 22

UV radiations bring about

Question # 23

Burning of fossil fuels is the main source of pollution

Question # 24

SO2and NO2produce pollution by increasing

Question # 25

Sulphur dioxide affects

Question # 26

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

Question # 27

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 28

Ecosystem is a smaller unit of

Question # 29

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 # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
4 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
5 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
6 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
7 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
8 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
9 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
10 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%

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