Environmental Chemistry Test

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Environmental Chemistry Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

The regions of the atmosphere, where clouds form and where we live respectively, are:

A
Stratosphere and Troposphere

B
Troposphere and Stratosphere

C
Troposphere and Troposphere

D
Stratosphere and Stratosphere

Solution

Solution:- (C) Troposphere and Troposphere
Troposphere is the lowest region of atmosphere bounded by Earth beneath and the stratosphere above where most of the clouds form and where life form exists.
Question 2
1 / -0

Which is wrong with respect to our responsibility as a human being to protect our environment?

A
Avoiding the use of floodlighted facilities.

B
Restricting the use of vehicles

C
Using plastic bags

D
Setting up compost tin in gardens,

Solution

Solution:- (C) Using plastic bags
Plastic bags pollute our land and water.
Question 3
1 / -0

Depletion of which gas in the atmosphere can lead to an increase incidence of skin cancers?

A
Nitrous oxide

B
Ozone

C
Ammonia

D
Methane

Solution

The ozone layer or ozone shield refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It contains high concentrations of ozone (O3) relative to other parts of the atmosphere, although still very small relative to other gases in the stratosphere.
Excessive exposure can also cause cataracts, immune system suppression, and genetic damage, resulting in problems such as skin cancer.
Question 4
1 / -0

World ozone day is celebrated on __________

A
$$16^{th}$$ September

B
$$5^{th}$$ June

C
$$22^{nd}$$ April

D
$$21^{st}$$ April
Solution
1. 16$$^{th}$$ september is celebrated as world ozone day
2. 5$$^{th}$$ June is celebrated as world environment day.
3. 22$$^{nd}$$ april is celebrated as Earth day.
4. 21$$^{st}$$ april is celebrated as civil services day.
So, the correct answer is option A.
Question 5
1 / -0

Photochemical smog formed in congested metropolitan cities mainly
consists of

A
Ozone, Peroxyacetyl nitrate and $$NO_x$$

B
Smoke, Peroxyacetyl nitrate and $$SO_2$$

C
Hydrocarbons, $$SO_2$$ and $$CO_2$$

D
Hydrocarbons, Ozone and $$SO_x$$

Solution

Photochemical smog is composed of primary and secondary pollutants.
Primary pollutants, which includes nitrogen oxides and volatile organic compounds are introduced into the atmosphere via vehicular emissions and industrial processes.
Secondary pollutants, like ozone and PAN (peroxyacyl nitrates), result from the reaction of primary pollutants with ultraviolet light. All of these harsh chemicals are usually highly reactive and oxidizing. Photochemical smog is therefore considered to be a problem of modern industrialization. It is present in all modern cities, but it is more common in cities with sunny, warm, dry climates and a large number of motor vehicles.
Therefore, the correct answer is option A.
Question 6
1 / -0

Nitrogen oxides produced by the emission of automobiles and power plants are the source of fine airborne particles, which lead to

A
Photochemical smog

B
Dry acid deposition

C
Industrial smog

D
Wet acid deposition

Solution

Photochemical smog is grey or yellowish brown opaque smog having an oxidizing environment with the little smoke. Photochemical smog contains secondary pollutants or photochemical oxidants. Photochemical smog is formed at high temperature over cities and towns due to still air, emission of nitrogen oxides and hydrocarbons from automobile exhausts and solar energy.
Question 7
1 / -0

Acid rain is due to pollution of

A
Dust

B
Pesticides

C
$$SO_2$$ and $$NO_2$$

D
Carbon particle

Solution

Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions with pH of less than 5. It is due to the excess of SO$$_2$$and NO$$_2$$ in the air which along with water form sulphurous and nitric acid. It can have harmful effects on plants, aquatic animals and infrastructure. Taj Mahal loss of whitening is because of Acid rain.
Therefore, the correct answer is option C.
Question 8
1 / -0

Ozone in stratosphere extends

A
10-20km

B
20-25km

C
15-30km

D
25-40km

Solution

The ozone layer can be traced in the stratosphere. It extends to 20-25 km away from the surface of the earth. It helps to absorb the ultraviolet radiation.
Therefore, the correct answer is option A.
Question 9
1 / -0

The stratospheric ozone depletion leads to?

A
Global warming

B
Increase in the incidence of skin cancers

C
Forest fires

D
All of the above
Solution
Thinning of ozone layer increases the amount of UV-B radiations reaching the earth.
This may lead to incidences of cataract, skin cancers, photo burning etc.
Decreased photosynthetic activity will increase carbon dioxide concentration of the atmosphere resulting in global warming.
Increased exposure of radiations may also lead to forest fires especially during dry summers.
So, the correct answer is 'All of the above'
Question 10
1 / -0

Positive pollution of soil is due to

A
Reduction in soil productivity

B
Addition of waste to soil

C
Excessive use of fertilizers

D
All of the above

Solution

Soil pollution is of two types positive soil pollution and negative soil pollution.
In the positive soil pollution, there occur an overuse of chemical fertilizers, air pollutants and pesticides along with herbicides and fumigants.
Therefore, the correct answer is option C.

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Environmental Chemistry Test - 9

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Environmental Chemistry Test - 9

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Question 1

Stratosphere and Troposphere

Troposphere and Stratosphere

Troposphere and Troposphere

Stratosphere and Stratosphere

Solution

Question 2

Avoiding the use of floodlighted facilities.

Restricting the use of vehicles

Using plastic bags

Setting up compost tin in gardens,

Solution

Question 3

Nitrous oxide

Ozone

Ammonia

Methane

Solution

Question 4

$$16^{th}$$ September

$$5^{th}$$ June

$$22^{nd}$$ April

$$21^{st}$$ April

Solution

Question 5

Ozone, Peroxyacetyl nitrate and $$NO_x$$

Smoke, Peroxyacetyl nitrate and $$SO_2$$

Hydrocarbons, $$SO_2$$ and $$CO_2$$

Hydrocarbons, Ozone and $$SO_x$$

Solution

Question 6

Photochemical smog

Dry acid deposition

Industrial smog

Wet acid deposition

Solution

Question 7

Dust

Pesticides

$$SO_2$$ and $$NO_2$$

Carbon particle

Solution

Question 8

10-20km

20-25km

15-30km

25-40km

Solution

Question 9

Global warming

Increase in the incidence of skin cancers

Forest fires

All of the above

Solution

Question 10

Reduction in soil productivity

Addition of waste to soil

Excessive use of fertilizers

All of the above

Solution

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