Environmental Chemistry Test

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Environmental Chemistry Test - 10

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Weekly Quiz Competition

Question 1
1 / -0

Nitrogen oxides, produced from the emission of automobiles and power plants, are the source of fine air borne particles which lead to

A
Photochemical smog

B
Dry acid deposition

C
Industrial smog

D
Wet acid deposition

Solution

Photochemical smog is composed of primary and secondary pollutants. Nitrogen oxides (primary pollutant) form peroxyacyl nitrate (secondary pollutant) by reacting with hydrocarbons. It leads to photochemical smog formation. 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 2
1 / -0

Rain is called acid-rain when is pH is below

A
$$7$$

B
$$6.5$$

C
$$6$$

D
$$5.6$$

Solution

Acid rain is rainfall and other forms of precipitation with a pH less than $$6.0$$ pH of normal rain is $$6-6.5$$. It is caused by the large scale emission of acidic gases into the atmosphere from thermal power plants, industries and automobiles.
Question 3
1 / -0

Which one of the following is an environment related disorder, with the correct main cause?

A
Black lung disease (pneumoconiosis) found mainly in workers in stone quarries and crushers.

B
Blue baby disease (methaemoglobinaemia) due to heavy use of nitrogen rich fertilizers in the area.

C
Non-Hodgkin's lymphoma found mainly in workers involved in manufacture of neem based pesticides.

D
Skin cancer mainly in people exposed to benzene and methane.

Solution

Blue baby disease is caused by nitrate poisoning (presence of methaemoglobin), resulting in organs and cell tissues that are deprived of oxygen and skin with the characteristic blush tint.
It is characterized by reduced ability of the blood to carry oxygen because of reduced levels of normal haemoglobin.
Question 4
1 / -0

According to origin, identify the secondary air pollutant.

A
$$SO_2$$

B
Ash

C
Ozone

D
Radioactive compound
Solution
- On the basis of the origin, there are different types of air pollutants.
- The primary pollutant is directly released into the atmosphere from the wastes. The secondary pollutants are produced due to the reaction of the primary pollutant with some other gases.
- The ozone is considered as the secondary air pollutant because it is formed due to the interaction of the volatile organic compounds in the atmosphere.
- Thus, the correct answer is option C.
Question 5
1 / -0

The pH of the acid rain is approximately:

A
5 to 6

B
2 to 3

C
6 to 7

D
>10

Solution

The pH of the acid rain is approximately 5-6.
Question 6
1 / -0

Which one is not dangerous for life and atmosphere?

A
Biopollutants

B
Ozone layer

C
Nuclear blast

D
Deforestation

Solution

Ozone layer or shield is present in the stratosphere. It is also called Ozonosphere. Ozonosphere lies at an altitude of 23 to 25 km over the equator and at slightly lower altitude elsewhere. Ninety percent of atmospheric ozone is present in the ozonosphere. Ozone found in the stratosphere is useful for life on earth as it protects the earth from harmful ultra-violet rays and other radiations.
Question 7
1 / -0

Atmosphere of big cities is polluted most by :

A
Automobile exhausts

B
Radioactive fall out

C
Household waste

D
Pesticide residue

Solution

The main source of pollution in metro cities is automobile exhausts.

As greater the city, more the population which uses private transport.

Hence, increase in pollution is caused by automobile exhausts.

Therefore, option A is correct.
Question 8
1 / -0

The temperature in troposphere with altitude:

A
increases

B
decreases

C
increases and then decreases

D
decreases and then increases

Solution

The temperature of the troposphere generally decreases as altitude increases. The rate at which the temperature decreases is called the environmental lapse rate (ELR).
Question 9
1 / -0

The result of ozone hole is

A
Acid rain

B
UV radiations reach the surface of earth

C
Global warming

D
Green house effect
Solution
- Ozone hole or thinning of ozone layer increases the amount of UV-B radiations reaching the earth.
- The increased ultraviolet radiation reaching the earth leads to increased disorders and UV radiations also inhibit photosynthesis leading to decreased productivity.
So, the correct answer is option B.
Question 10
1 / -0

If $$CCl_{3}F$$(CFCs) is present in the stratosphere, it will react with which of the following:
A) Ozone B) $$N_{2}$$ C)$$CO_{2}$$

A
A

B
B

C
A & B

D
C & A

Solution

Chlorofluorocarbon causes depletion of ozone, so, $$CCl_{3}F$$ will react with ozone in the stratosphere.

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Re-Attempt Weekly Quiz Competition

Environmental Chemistry Test - 10

Result

Environmental Chemistry Test - 10

Score

-

Rank

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SHARING IS CARING

Question 1

Photochemical smog

Dry acid deposition

Industrial smog

Wet acid deposition

Solution

Question 2

$$7$$

$$6.5$$

$$6$$

$$5.6$$

Solution

Question 3

Black lung disease (pneumoconiosis) found mainly in workers in stone quarries and crushers.

Blue baby disease (methaemoglobinaemia) due to heavy use of nitrogen rich fertilizers in the area.

Non-Hodgkin's lymphoma found mainly in workers involved in manufacture of neem based pesticides.

Skin cancer mainly in people exposed to benzene and methane.

Solution

Question 4

$$SO_2$$

Ash

Ozone

Radioactive compound

Solution

Question 5

5 to 6

2 to 3

6 to 7

>10

Solution

Question 6

Biopollutants

Ozone layer

Nuclear blast

Deforestation

Solution

Question 7

Automobile exhausts

Radioactive fall out

Household waste

Pesticide residue

Solution

Question 8

increases

decreases

increases and then decreases

decreases and then increases

Solution

Question 9

Acid rain

UV radiations reach the surface of earth

Global warming

Green house effect

Solution

Question 10

A

B

A & B

C & A

Solution

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