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 one is the most toxic?

Question # 2

Polycyolic aromatic hydrocarbons are taught to be

Question # 3

Result of ozone hole is

Question # 4

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

Question # 5

Chief air pollutant which is likely to deplete ozone layer

Question # 6

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

Question # 7

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

Question # 8

NO and NO2gases in atmosphere are represented by

Question # 9

Which is not a method for solid waste management

Question # 10

Increasing skin cancer and high mutation rate are due to

Question # 11

Burning of fossil fuels is the main source of pollution

Question # 12

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

Question # 13

Ultraviolet radiation from sun causes a reaction that produces

Question # 14

The largest item which is recycled is

Question # 15

Which heavy metals do not have any safe limits

Question # 16

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

Question # 17

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

Question # 18

Soil remediation means

Question # 19

Which step is unnecessary for purification of water for drinking purposes

Question # 20

B.O.D is connected with

Question # 21

Spraying of DDT produces pollution of

Question # 22

The amount of Si in the lithosphere is about

Question # 23

Carbon monoxide is pollutant as it

Question # 24

Chloroflurocarbon releases a chemical harmful to ozone

Question # 25

In the atmosphere, O2is about

Question # 26

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 # 27

Environmental pollution affects

Question # 28

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

Question # 29

Acid rain is due to increase in atmospheric concentration of

Question # 30

Shahi Qilla may be destroyed by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
2 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
3 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
4 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
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 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
7 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
8 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
9 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
10 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution

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