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

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 2

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 3

Biodegradable pollutant is

Question # 4

Chromium (VI) is highly toxic and can cause

Question # 5

Drawback DDT as presticide is

Question # 6

BOD is

Question # 7

Result of ozone hole is

Question # 8

DDT is

Question # 9

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

Question # 10

Acid rain is due to increase in atmospheric concentration of

Question # 11

Depletion of ozone layer is due to

Question # 12

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 # 13

In the atmosphere, CO2is about

Question # 14

Which of the following is not an air

Question # 15

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 16

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

Question # 17

Fungicides are the pesticides which

Question # 18

Which one is the most toxic?

Question # 19

Minamata disease is due to pollution of

Question # 20

The pH range of the acid rain is

Question # 21

Which one is not a pollutant normally?

Question # 22

The normal amount of overhead ozone is about

Question # 23

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 # 24

Ecology is a science of environment and deals specially with

Question # 25

In Antarctica ozone depletion is due to the formation of following compound

Question # 26

B.O.D is connected with

Question # 27

In the atmosphere, O2is about

Question # 28

Which gas is not a constituent of atmosphere

Question # 29

The % of CO2is the atmosphere is

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 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
2 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
3 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
4 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers
5 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
6 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
7 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
8 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
9 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
10 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane

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