ECAT Pre Engineering Chemistry Chapter 27 MCQ Test With Answer

Question # 1

Atomospheric pollutant is

CO₂ A
CO B
O₂ C
N₂ D

Question # 2

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Low value A
Higher value B
Both values C
None of these D

Question # 3

Photochemical smog is caused by

CO A
CO₂ B
O₃ C
NO₂ D

Question # 4

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

Iodine A
Bromine B
Lead C
Carbon D

Question # 5

Which factor is helping to reduce the environmental pollution

Rapid growth of population A
Urbanization B
Industrialization C
Increase of plantation D

Question # 6

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

Ozone A
Nitrous oxide B
Sulphure dioxide C
Carbon monoxide D

Question # 7

The normal amount of overhead ozone is about

250 Du A
300 DU B
350 DU C
400 DU D

Question # 8

SO₂and NO₂produce pollution by increasing

Alkalinity A
Acidity B
Neutrality C
Buffer action D

Question # 9

Chromium (VI) is highly toxic and can cause

Blindness A
Cancer B
Liver problems C
Blood problems D

Question # 10

Water which his considered to be safe for human consumption is known as

Distilled water A
Contaminated water B
Potable water C
Rain water D

Question # 11

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

Blow air A
Add Na₂CO₃ B
Use a specially made sorbent having flouring trapped in it C
Use a sorbent having Al₂O₃trapped in it D

Question # 12

Shahi Qilla may be destroyed by

Flood in Ravi A
Temperature mediated spoilage of marble B
Air pollutants from Lahore chemical industries C
All the above D

Question # 13

Drained sewage has B.O.D

More than that of water A
Less than that of water B
Equal to that of water C
None of the above D

Question # 14

Classical smog occurs in palces of

Excess SO₂ A
Low temperature B
High temperature C
Excess NH₃ D

Question # 15

UV radiations bring about

Skin cancer A
Mouth cancer B
Lung cancer C
Liver cancer D

Question # 16

Ecosystem is a smaller unit of

Hydrosphere A
Lithosphere B
Biosphere C
Atmosphere D

Question # 17

Swage water is purified by

Microorganisms A
Light B
Fishes C
Aquatic plants D

Question # 18

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

2 - 4 ppm A
4 - 6 ppm B
2 - 5 ppm C
4 - 8 ppm D

Question # 19

The largest item which is recycled is

Newspaper A
Plastic B
Aluminium C
Oil D

Question # 20

Drawback DDT as presticide is

I becomes ineffective after some time A
It is less effective than others B
It is not easily/rapidly degraded in nature C
Its high cost D

Question # 21

Pollution is

Removal of top soill A
Release of toxic/undesirable materials in enevironment B
Conversation of energy C
All the above D

Question # 22

Spraying of DDT produces pollution of

Air A
Air and water B
Air and soil C
Air, water and soil D

Question # 23

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

Primary pollutant A
Secondary pollutant B
Tertiary pollutant C
None of these D

Question # 24

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

Fullerences A
Freons B
Polyhalogens C
Ferrocene D

Question # 25

Chloroflurocarbon releases a chemical harmful to ozone

Fluorine A
Chlorine B
Nitrogen peroxide C
Sulphure dioxdie D

Question # 26

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

Pesticides A
Septic tanks B
Petroleum and natural gas production C
All of these D

Question # 27

Soil remediation means

To make it suitable for cultivation of crops A
To make it acidic B
To make it alkeline C
To add manure into it D

Question # 28

Environmental pollution affects

Biotic components A
Plants only B
Man only C
Biotic and abiotic components of environment D

Question # 29

Which step is unnecessary for purification of water for drinking purposes

Aeration A
Coagulation B
Treatment with chlorine C
Treatment with iodine D

Question # 30

Increasing skin cancer and high mutation rate are due to

Acid rain A
Ozone depletion B
CO pollution C
CO₂Pollution D

Sr.#	Question	Answer
1	Shahi Qilla may be destroyed by	A. Flood in Ravi B. Temperature mediated spoilage of marble C. Air pollutants from Lahore chemical industries D. All the above
2	When chlorofluoro carbon are subjected to U.V. they form	A. Cations B. Anions C. Free radicals D. None of these
3	Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water	A. SO₂ B. NO₂ C. CO D. A and b only
4	Environmental pollution affects	A. Biotic components B. Plants only C. Man only D. Biotic and abiotic components of environment
5	Hydrocarbans, SO₂, CO, NH₃, nitrogen oxides and compounds of fluorine are called	A. Primary pollutant B. Secondary pollutant C. Tertiary pollutant D. None of these
6	Which of the following human activities are contaminating surface and ground waters	A. Pesticides B. Septic tanks C. Petroleum and natural gas production D. All of these
7	Atmosphere of big/metropolitan cities is polluted most by	A. Automobile exhausts B. Pesticide residue C. Household waste D. Radio-active fall out
8	Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water	A. Low value B. Higher value C. Both values D. None of these
9	B.O.D is connected with	A. Organic matter B. Microbes C. Mircrobes and organic matter D. None of the above
10	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	A. Blow air B. Add Na₂CO₃ C. Use a specially made sorbent having flouring trapped in it D. Use a sorbent having Al₂O₃trapped in it

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ECAT Pre Engineering Chemistry Chapter 27 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

ECAT Chemistry Chapter 27 Environmental Chemistry

Atomospheric pollutant is

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Photochemical smog is caused by

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

Which factor is helping to reduce the environmental pollution

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

The normal amount of overhead ozone is about

SO2and NO2produce pollution by increasing

Chromium (VI) is highly toxic and can cause

Water which his considered to be safe for human consumption is known as

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

Shahi Qilla may be destroyed by

Drained sewage has B.O.D

Classical smog occurs in palces of

UV radiations bring about

Ecosystem is a smaller unit of

Swage water is purified by

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

The largest item which is recycled is

Drawback DDT as presticide is

Pollution is

Spraying of DDT produces pollution of

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

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

Chloroflurocarbon releases a chemical harmful to ozone

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

Soil remediation means

Environmental pollution affects

Which step is unnecessary for purification of water for drinking purposes

Increasing skin cancer and high mutation rate are due to

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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

SO₂and NO₂produce pollution by increasing

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