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 step is unnecessary for purification of water for drinking purposes

Question # 2

Which heavy metals do not have any safe limits

Question # 3

A single chlorine free radical can destroy how many ozone molecules

Question # 4

The pH range of the acid rain is

Question # 5

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

Question # 6

Sulphur dioxide affects

Question # 7

In incinerating the waste is burnt at

Question # 8

Ecosystem is a smaller unit of

Question # 9

SO2and NO2produce pollution by increasing

Question # 10

Carbon monoxide is pollutant as it

Question # 11

Which gas is not a constituent of atmosphere

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Most hazardous metal pollutant of automobile exhaust is

Question # 16

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

Question # 17

Photochemical smog is caused by

Question # 18

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

Question # 19

The amount of oxygen in the lithosphere is about

Question # 20

Exposure to CO results in

Question # 21

Spraying of DDT produces pollution of

Question # 22

Acid rain is due to increase in atmospheric concentration of

Question # 23

Classical smog occurs in palces of

Question # 24

Acid rains are produced by

Question # 25

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 # 26

Which of the following is not an air

Question # 27

Ozone hole is maximum over

Question # 28

Which causes water pollution?

Question # 29

Ultraviolet radiation from sun causes a reaction that produces

Question # 30

Which of the following human activities are contaminating surface and ground waters

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
2 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers
3 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
4 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
5 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
6 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
7 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
8 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
9 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
10 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there

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