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RRB NTPC Exam General Awareness Study Material

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Environmental Studies

Bio degradable wastes can usually be converted into useful substances with the help of

a) Bacteria
b) Nuclear protiens
c) Radioactive substances
d) Ciruses

✔Answer

✔Solution

Correct Answer Is : Nuclear protiens

Solution Is : Biodegradable wastes can usually be converted into useful substances with the help of nuclear protiens.

Of the following, which one pollutes the air of a big city ?

a) Copper
b) Chromium
c) Lead
d) Calcium

✔Answer

✔Solution

Correct Answer Is : Lead

Solution Is : Lead pollutes the air of a big city . It is release by vehicles .

Ultraviolet light of Sun`s radiation is prevented from reaching the Earth`s atmosphere by the layer of

a) Oxygen
b) Hydrogen
c) Ozone
d) Helium

✔Answer

✔Solution

Correct Answer Is : Ozone

Solution Is : Ultraviolet light of Sun`s radiation is prevented from reaching the Earth`s atmosphere by the layer of Ozone.

Greater population can be supported on the Earth only if we eat more

a) Mutton
b) Eggs
c) Plant products
d) Beef

✔Answer

✔Solution

Correct Answer Is : Plant products

Solution Is : Greater population can be supported on the Earth only if we eat more plant products .

People die in an atmosphere of carbon dioxide because

a) It is a poisonous gas
b) It destroys tissues
c) Of want of oxygen
d) Of suffocation

✔Answer

✔Solution

Correct Answer Is : Of want of oxygen

Solution Is : Lack of oxygen resulted in working stopage of many organs of our body

Which of the following acts as photo sensitizer during photosynthesis

a) Oxygen
b) Nitrogen
c) Chlorophyll
d) Chlorine

✔Answer

✔Solution

Correct Answer Is : Chlorophyll

Solution Is : Chlorophyll acts as a photosentizer during photosynthesis.It is responsible for the green colour of leaves

What happens when bleaching powder is left exposed to air ?

a) It turns dark brown in colour
b) It turns yellow in colour
c) It gradually loses its oxygen
d) It gradually loses its chlorine

✔Answer

✔Solution

Correct Answer Is : It gradually loses its chlorine

Solution Is : Bleaching powder loses its chlorine gradually when its oxidized with the presence of air

Arsenic pollution leads to

a) White foot disease
b) Black foot disease
c) Dyslexia
d) Allergy

✔Answer

✔Solution

Correct Answer Is : Allergy

Solution Is : Arsenic pollution leads to allergy.many skin problems are the ressult of arsenic pollution

Which one the following does not contribute to pollution?

a) Thermal power plant
b) Nuclear power plant
c) Hydroelectric power plant
d) Atomic power plant

✔Answer

✔Solution

Correct Answer Is : Hydroelectric power plant

Solution Is : Hydroelectric powerplant works on the power of water . So it doesn?t contribute most percentage of pollution in environment

Which of the following are the two major components of dry air (by volume)

a) Nitrogen and oxygen
b) Oxygen and Argon
c) Nitrogen and ammonia
d) Oxygen and carbon dioxide

✔Answer

✔Solution

RRB NTPC Exam General Awareness Study Material

Environmental Studies

Bio degradable wastes can usually be converted into useful substances with the help of

Correct Answer Is : Nuclear protiens

Solution Is : Biodegradable wastes can usually be converted into useful substances with the help of nuclear protiens.

Of the following, which one pollutes the air of a big city ?

Correct Answer Is : Lead

Solution Is : Lead pollutes the air of a big city . It is release by vehicles .

Ultraviolet light of Sun`s radiation is prevented from reaching the Earth`s atmosphere by the layer of

Correct Answer Is : Ozone

Solution Is : Ultraviolet light of Sun`s radiation is prevented from reaching the Earth`s atmosphere by the layer of Ozone.

Greater population can be supported on the Earth only if we eat more

Correct Answer Is : Plant products

Solution Is : Greater population can be supported on the Earth only if we eat more plant products .

People die in an atmosphere of carbon dioxide because

Correct Answer Is : Of want of oxygen

Solution Is : Lack of oxygen resulted in working stopage of many organs of our body

Which of the following acts as photo sensitizer during photosynthesis

Correct Answer Is : Chlorophyll

Solution Is : Chlorophyll acts as a photosentizer during photosynthesis.It is responsible for the green colour of leaves

What happens when bleaching powder is left exposed to air ?

Correct Answer Is : It gradually loses its chlorine

Solution Is : Bleaching powder loses its chlorine gradually when its oxidized with the presence of air

Arsenic pollution leads to

Correct Answer Is : Allergy

Solution Is : Arsenic pollution leads to allergy.many skin problems are the ressult of arsenic pollution

Which one the following does not contribute to pollution?

Correct Answer Is : Hydroelectric power plant

Solution Is : Hydroelectric powerplant works on the power of water . So it doesn?t contribute most percentage of pollution in environment

Which of the following are the two major components of dry air (by volume)

Correct Answer Is : Nitrogen and oxygen

Solution Is : Nitrogen and oxygen are the two major components of our atmosphere.There are 78% of nitrogen and 21% of oxygen in our environment

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