Environmental Issues Test

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Environmental Issues Test - 76

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Weekly Quiz Competition

Question 1
1 / -0

The sources for radioactive pollution are

A
Nuclear power plant and nuclear fuel

B
Celebration of festivals

C
Industrial waste

D
None of the above

Solution
Question 2
1 / -0

Strontium of radio-active fall out is

A
Sr$$^{95}$$

B
Sr$$^{90}$$

C
Sr$$^{80}$$

D
Sr$$^{85}$$

Solution

Sr$$^{90}$$ is a radioactive isotope of strontium. It is formed in nuclear reactors or during the explosion of nuclear weapons. A large portion of this strontium accumulates in the bone. It behaves like calcium and mostly attaches to the surfaces of bones. This leads to cancer as a result of damage to the genetic material of the bone, nose, and lung and leukemia cells
So, the correct answer is 'Sr$$^{90}$$
Question 3
1 / -0

The ultimate environmental hazard or the most outstanding danger for the survival of living beings on this planet is

A
Radiation hazard

B
Glaciation

C
Deforestation

D
Desertification

Solution

Nuclear pollution is extremely hazardous in nature. It occurs as a result of nuclear explosions that are performed during nuclear tests. The explosions cause the release of radioactive material into the stratosphere from where they fall into the earth's atmosphere.The smallest particles of the radioactive material called fallout settle on the leaves of plants and trees. These leaves are eaten by the grazing animals. Hence radioactive material enters the ecosystem. Humans consume these particles through the food chain leading to cancer and genetic mutation. Genetic mutations have long-term deteriorating effect. Fallouts may also accumulate in the seas that harm fishes and ultimately humans. Hence radiation hazard or nuclear pollution is the most dangerous for the survival of living beings on this planet. Thus the correct answer is option A.
Question 4
1 / -0

One of the most dangerous radioactive pollution is

A
C$$^{14}$$

B
S$$^{35}$$

C
Sr$$^{90}$$

D
P$$^{32}$$

Solution

Sr$$^{90}$$ is a radioactive isotope of strontium. It is formed in nuclear reactors or during the explosion of nuclear weapons. A large portion of this strontium accumulates in the bone. It behaves like calcium and mostly attaches to the surfaces of bones. This leads to cancer as a result of damage to the genetic material of the bone, nose, and lung and leukemia cells. Thus the correct answer is option C.
Question 5
1 / -0

Which of the following is not a vehicular norm implemented to various cities of india till date?

A
Euro III

B
Bharat Stage II

C
Euro IV

D
Euro VI
Question 6
1 / -0

Which among the following is not a source of radioactive pollution?

A
Nuclear power

B
Mining

C
Medical waste

D
Construction noise

Solution
Question 7
1 / -0

Which one of the following statement is true?

A
The greater the BOD of waste water, more is its polluting potential.

B
The greater the BOD of waste water, less is its polluting potential.

C
The lesser the BOD of waste water, more is its polluting potential.

D
All of the above.
Solution
A.Correct option A

B.Explanation for correct option:
- The greater the BOD (Biochemical Oxygen Demand) of the water, the more is its polluting potential because the rapidly the oxygen is depleted in the water. This means lesser oxygen is available for higher forms of aquatic life and thus water will be disturbed.
- The consequences of the high BOD are the same as those for low dissolved oxygen in water: aquatic organisms become stressed, suffocate and then die because of less availability of oxygen.
- Thus, its polluting potential will be more as the number of decomposing bacteria in water will be high due to which BOD of water increases.
Question 8
1 / -0

Discarded or left-over solid material being produced at homes, commercial waste are called

A
Biodegradable waste

B
Solid waste

C
BOD

D
All

Solution

A.Correct option -B

B.Explanation for correct option -B
A solid waste is any material that is discarded by human beings.
Examples -Household Hazardous Waste ,Construction and Demolition waste,
Industrial/Commercial Waste, etc
Question 9
1 / -0

Which of the following is caused by an increase in $$\displaystyle { CO }_{ 2 }$$ concentration in the atmosphere?

A
Global warming

B
Eutrophication of lakes

C
Depletion of the ozone layer

D
Magnification in the food chain

E
Acid rain

Solution

Global warming is caused by increased concentration of greenhouse gases (carbon dioxide is one of the greenhouse gas) in the atmosphere. Increased organic matter in lakes causes eutrophication. Ozone depletion is mainly related to the use of CFC-based products. Acid rain is the result of increased sulphur and nitrogen oxide levels in the atmosphere. Increased use of pesticides causing the death of predators will cause accumulation of nonbiodegradable compounds in the food chain. Thus, the correct answer is option A.
Question 10
1 / -0

Biological Oxygen Demand(BOD) is a measure of

A
Industrial wastes poured into water bodies

B
Extent to which water is polluted with organic compound

C
Amount of carbon monoxide inseparable combined with haemoglobin

D
Amount of oxygen needed by green plants during night

Solution

Biological Oxygen Demand (BOD) is a measure of extent to which water is polluted with organic compound. Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. Hence, option B is correct.

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Re-Attempt Weekly Quiz Competition

Environmental Issues Test - 76

Result

Environmental Issues Test - 76

Score

-

Rank

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SHARING IS CARING

Question 1

Nuclear power plant and nuclear fuel

Celebration of festivals

Industrial waste

None of the above

Solution

Question 2

Sr$$^{95}$$

Sr$$^{90}$$

Sr$$^{80}$$

Sr$$^{85}$$

Solution

Question 3

Radiation hazard

Glaciation

Deforestation

Desertification

Solution

Question 4

C$$^{14}$$

S$$^{35}$$

Sr$$^{90}$$

P$$^{32}$$

Solution

Question 5

Euro III

Bharat Stage II

Euro IV

Euro VI

Question 6

Nuclear power

Mining

Medical waste

Construction noise

Solution

Question 7

The greater the BOD of waste water, more is its polluting potential.

The greater the BOD of waste water, less is its polluting potential.

The lesser the BOD of waste water, more is its polluting potential.

All of the above.

Solution

Question 8

Biodegradable waste

Solid waste

BOD

All

Solution

Question 9

Global warming

Eutrophication of lakes

Depletion of the ozone layer

Magnification in the food chain

Acid rain

Solution

Question 10

Industrial wastes poured into water bodies

Extent to which water is polluted with organic compound

Amount of carbon monoxide inseparable combined with haemoglobin

Amount of oxygen needed by green plants during night

Solution

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