Environmental Chemistry Test

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Environmental Chemistry Test - 70

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Weekly Quiz Competition

Question 1
1 / -0

Acid rain occurs above the area where

A
There is excess release of $$NH_3$$ and coal gas

B
Factories are expelling $$SO_2$$ into air

C
There is excess production of $$CO_2$$ due to excessive combustion and respiration

D
There is excess production of gaseous hydrocarbons

Solution

Acid rain is a result of a chemical reaction occurring in a localized area where the concentration of the oxides of nitrogen and sulphur are high. An area where there are factories will have an accumulation of sulphur dioxide in the air. These oxides react with water and precipitate in the form of the acid rain. For example, around the Taj Mahal area, the presence of the Mathura Refinery has caused multiple events of acid rain.
Hence, the correct answer is 'Factories are expelling SO$$_{2}$$ into air'.
Question 2
1 / -0

Exposure of UV radiations causes

A
Damage to eye sight

B
Sunburn

C
Skin cancer

D
All of the above

Solution

The exposure to the UV radiations have an ionizing and distorting effect to the body of the humans. It causes damage to the eyes by destroying the essentials of the eye-lens. The sunburn occurs due to high intensity. Skin cancer is caused due to distortion of the DNA by the formation of the pyrimidine dimers, such that the DNA cannot be replicated properly.
Hence, the correct answer is 'All of the above'.
Question 3
1 / -0

Agricultural use of DDT was banned in India during

A
$$1962$$

B
$$1972$$

C
$$1974$$

D
$$1985$$

Solution

DDT was used in the second half of World War II to control malaria and typhus among civilians and troops. Its publication was a seminal event for the environmental movement and resulted in a large public outcry that eventually led, in 1972, to a ban on DDT's agricultural use in the United States.
SO the correct answer is '1972'.
Question 4
1 / -0

Which one contains secondary pollutants?

A
Automobile exhausts

B
Chimney smog

C
Photochemical smog

D
Classical smog

Solution

The photochemical reaction is caused by absorption of energy in the form of light. The word smog is formed of smoke and smog. Photochemical smog is the major contributor to the air pollution and is composed of primary and secondary pollutants. Primary being the nitrogen oxides and volatile organic compounds likeUnsaturated hydrocarbons are those that have double or triple covalent bonds between adjacent carbon atoms. e.g., Ethylene
Automobile exhausts, chimney smog and classical smog contain the primary pollutants like the oxides of nitrogen, sulphur, carbon and dust.
Hence, the correct answer is 'Photochemical smog'.
Question 5
1 / -0

Which of the following statement/s is/are correct with regard to ozone depletion:
1. The ozone hole is measured in terms of ozone concentrations, which is expressed in Dobson units.
2. The major cause for ozone depletion is the presence of CFCs in the stratosphere - CFCs are entirely man-made and not found naturally.

A
Only 1

B
Only 2

C
Both A and B

D
None of the above
Solution
- CFCs and other halogenated ozone depleting substances (ODS) are mainly responsible for manmade chemical ozone depletion.
- The total amount of effective halogen (Chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine.
So, the correct option is 'Both A and B'.
Question 6
1 / -0

Study the following statements regarding acid rain and select the incorrect ones:
(i) Acid rain refers to the rainfall and other forms of precipitation with a pH of less than $$5$$
(ii) Oxides of sulphur and nitrogen are released from automobile exhausts, industries, power plants, etc.
(iii) These oxides of sulphur and nitrogen, may react with water in the air and form sulphuric acid $$(H_2SO_4)$$ and nitric acid $$(HNO_3)$$.
(iv) Acid rain has harmful effects on animals and human beings but no characteristic impact on plants.

A
(i) and (iii)

B
(iii) and (iv)

C
(iv) only

D
(ii) only

Solution
Question 7
1 / -0

Depletion of the Ozone layer in the stratosphere is caused by.

A
Carbon monoxide

B
Hydrocarbons

C
Nitrogen dioxide

D
Polychloro-biphenyls

Solution
Question 8
1 / -0

Temperature inversions are responsible for

A
Greenhouse effect

B
Smog

C
Acid rains

D
Heat islands

Solution

Temperature inversions have a great effect on air pollution. Whether it is a blanket of smog over a city or the melting of ice packs due to ozone depletion, atmospheric inversions are intricately involved. Smog is a fog made heavier and darker by smoke and chemical fumes. They influence the scope and intensity of the effects of air pollution on a temporary, localized basis as well as long term and globally. The temperature of atmosphere decreases with height.
So the correct option is 'smog'.
Question 9
1 / -0

Storm is caused by the _______________.

A
Depletion of ozone layer

B
Presence of high humidity in the atmosphere

C
Rapid accumulation of $$CO_2$$ in the atmosphere

D
Rapid build-up of products of photochemical oxidation of pollutants in the atmosphere
Question 10
1 / -0

Petroleum wastes are degraded by the action of ______________.

A
Flavobacterium

B
Acetobacter aerogens

C
Pseudomonas putida

D
Pseudomonas fluorescence

Solution

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Re-Attempt Weekly Quiz Competition

Environmental Chemistry Test - 70

Result

Environmental Chemistry Test - 70

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SHARING IS CARING

Question 1

There is excess release of $$NH_3$$ and coal gas

Factories are expelling $$SO_2$$ into air

There is excess production of $$CO_2$$ due to excessive combustion and respiration

There is excess production of gaseous hydrocarbons

Solution

Question 2

Damage to eye sight

Sunburn

Skin cancer

All of the above

Solution

Question 3

$$1962$$

$$1972$$

$$1974$$

$$1985$$

Solution

Question 4

Automobile exhausts

Chimney smog

Photochemical smog

Classical smog

Solution

Question 5

Only 1

Only 2

Both A and B

None of the above

Solution

Question 6

(i) and (iii)

(iii) and (iv)

(iv) only

(ii) only

Solution

Question 7

Carbon monoxide

Hydrocarbons

Nitrogen dioxide

Polychloro-biphenyls

Solution

Question 8

Greenhouse effect

Smog

Acid rains

Heat islands

Solution

Question 9

Depletion of ozone layer

Presence of high humidity in the atmosphere

Rapid accumulation of $$CO_2$$ in the atmosphere

Rapid build-up of products of photochemical oxidation of pollutants in the atmosphere

Question 10

Flavobacterium

Acetobacter aerogens

Pseudomonas putida

Pseudomonas fluorescence

Solution

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