Environmental Issues Test

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Environmental Issues Test - 35

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following damages WBC, bone marrow and lymph nodes?

A
Ca$$^{40}$$

B
I$$^{131}$$

C
Sr$$^{90}$$

D
Caesium

Solution

I$$^{131}$$ is a radionuclide that gets deposited in the bone marrow. Radioactive iodine emits high-energy gamma radiation which can damage body cells. It can cause leukemia, depression of the immune system or blood diseases of various kinds. Thus the correct answer is option B.
Question 2
1 / -0

The common refrigerant chlorofluoromethane (Freon) and NO$$_x$$ is a serious pollutant because?

A
It destroys haemoglobin

B
It disrupts O$$_3$$ layer

C
It lowers atmospheric temperature

D
It prevents cloud condensation

Solution
Question 3
1 / -0

BOD is related to

A
Organic pollutants

B
Detergents

C
Putrescibility

D
Inorganic pollutants

Solution

BOD is abbreviated form of biological oxygen demand. It is the amount of oxygen required by microbes to break down the organic matter present in a certain volume of a sample of water. The amount of BOD in the water is a measure of a number of organic pollutants in the water.
Thus, the correct answer is option A.
Question 4
1 / -0

C.O.D. stands for

A
Chemical oxygen demand

B
Control of diesel

C
Csiumoxide deposition

D
Cemistry of depositions

Solution

C.O.D. stands for chemical oxygen demand. It is the measurement of the pollution which is based on the chemical decomposition of organic and oxidation of the inorganic contaminants present in dissolved water. It is mainly used against waste water which is contaminated by domestic and industrial wastes.
So, the correct answer is option A.
Question 5
1 / -0

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

A
Radiation hazard or nuclear pollution

B
Glaciation

C
Deforestation

D
Desertification

Solution

Nuclear radiation damages DNA molecules and cells begins to die causing radiation sickness and ultimately death. Since it affects the DNA, the affects will remain in the forthcoming generations as well So, the correct answer is 'Radiation hazard or nuclear pollution'
Question 6
1 / -0

In the polluted water, the values of

A
C.O.D. slightly higher than B.O.D.

B
C.O.D. much higher than B.O.D.

C
B.O.D. slightly higher than C.O.D.

D
B.O.D. much higher than C.O.D.
Question 7
1 / -0

Which of the following does not contributes to greenhouse effect?

A
Carbon dioxide

B
Carbon monoxide

C
Chloro-fluoro carbon and Methane

D
Refrigerant freon

Solution

Greenhouse gases are the compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere. Popular of them are carbon dioxide, methane, chloro-fluoro carbon, nitrous oxide, freon and ozone while carbon monoxide is silent killer gas
So, the correct answer is option B.
Question 8
1 / -0

What is the potential danger of greenhouse effect?

A
Poor photosynthesis

B
Heavy rainfall

C
Coastal flooding

D
More humidity in environment
Question 9
1 / -0

Ultraviolet light causes

A
Destruction of hydrogen bonds between complementary DNA strands

B
Photodynamic action

C
Sticky metaphases

D
Formation of pyrimidines

Solution

DNA is one of the prime molecules and provides stability for proper functioning and existence of all living systems. Ultra-violet radiations are power molecules whose exposure breaks the hydrogen bonds of dna and thus altering its structure and affecting the genomic stability.
So, the correct answer is option A.
Question 10
1 / -0

What immediate hazard is likely to occur if the temperature of the earth rises by 5$$^oC$$?

A
Increase in productivity

B
Melting of polar ice

C
Destruction of phytoplanktons

D
Inundation of coastal towns

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Re-Attempt Weekly Quiz Competition

Environmental Issues Test - 35

Result

Environmental Issues Test - 35

Score

-

Rank

-

SHARING IS CARING

Question 1

Ca$$^{40}$$

I$$^{131}$$

Sr$$^{90}$$

Caesium

Solution

Question 2

It destroys haemoglobin

It disrupts O$$_3$$ layer

It lowers atmospheric temperature

It prevents cloud condensation

Solution

Question 3

Organic pollutants

Detergents

Putrescibility

Inorganic pollutants

Solution

Question 4

Chemical oxygen demand

Control of diesel

Csiumoxide deposition

Cemistry of depositions

Solution

Question 5

Radiation hazard or nuclear pollution

Glaciation

Deforestation

Desertification

Solution

Question 6

C.O.D. slightly higher than B.O.D.

C.O.D. much higher than B.O.D.

B.O.D. slightly higher than C.O.D.

B.O.D. much higher than C.O.D.

Question 7

Carbon dioxide

Carbon monoxide

Chloro-fluoro carbon and Methane

Refrigerant freon

Solution

Question 8

Poor photosynthesis

Heavy rainfall

Coastal flooding

More humidity in environment

Question 9

Destruction of hydrogen bonds between complementary DNA strands

Photodynamic action

Sticky metaphases

Formation of pyrimidines

Solution

Question 10

Increase in productivity

Melting of polar ice

Destruction of phytoplanktons

Inundation of coastal towns

User

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My Perfomance

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