Explore topic-wise MCQs in Environmental Science.

This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Science knowledge and support exam preparation. Choose a topic below to get started.

1.

The ozone hole is a phenomenon that has occurred in:

A. Arctic region
B. Northern temperate region
C. Southern temperate region
D. None of the mentioned
Answer» E.
Discussion
2.

In which season is the ozone found at its maximum level in the northern hemisphere?

A. Winter
B. Summer
C. Spring
D. Autumn
Answer» D. Autumn
Discussion
3.

The long UV-B radiations are important for vitamin D production of the skin.

A. True
B. False
Answer» B. False
Discussion
4.

The ozone layer absorbs what range of wavelengths of the sun’s radiation?

A. 0.80 nm – 1.50 nm
B. 200 nm – 315 nm
C. 450 nm – 570 nm
D. 600 nm – 750 nm
Answer» C. 450 nm – 570 nm
Discussion
5.

Who discovered the ozone layer?

A. Henri Buisson & Charles Fabry
B. Carl Sagan & Charles Fabry
C. G.M.B Dobson
D. Carl Sagan &G.M.B Dobson
Answer» B. Carl Sagan & Charles Fabry
Discussion
6.

THE_LONG_UV-B_RADIATIONS_ARE_IMPORTANT_FOR_VITAMIN_D_PRODUCTION_OF_THE_SKIN.?$

A. True
B. False
Answer» B. False
Discussion
7.

When was the ozone hole discovered?$

A. 1974
B. 1964
C. 1994
D. 1984
Answer» E.
Discussion
8.

In_which_season_is_the_ozone_found_at_its_maximum_level_in_the_northern_hemisphere?$

A. Winter
B. Summer
C. Spring
D. Autumn
Answer» D. Autumn
Discussion
9.

The Montreal Protocol bans the production of which of the following chemical substances?

A. Chlorine, bromine, CFCs, freons
B. Carbon tetrachloride, halons, trichloroethane, CFCs
C. CFCs, bromine, halons, freons
D. CFCs, halons, freons
Answer» C. CFCs, bromine, halons, freons
Discussion
10.

What does EESC stand for in context of ozone depleting compounds?

A. Equivalent Effective Stratospheric Chlorine
B. Equivalent Effective Stratospheric Chlorofluorocarbons
C. Equivalent Energy Saving Compounds
D. Energy Effective Stratospheric Compounds
Answer» B. Equivalent Effective Stratospheric Chlorofluorocarbons
Discussion
11.

Which of the following chemicals are responsible for the depletion of the stratospheric ozone layer?

A. Refrigerants
B. Propellants
C. Foam-blowing agents
D. All of the mentioned
Answer» E.
Discussion
12.

The_ozone_hole_is_a_phenomenon_that_has_occurred_in:

A. Arctic region
B. Northern temperate region
C. Southern temperate region
D. None of the mentioned
Answer» E.
Discussion
13.

Which of the following UV radiations is responsible for causing sun burns and skin cancer?

A. UV-A
B. UV-B
C. UV-C
D. All of the mentioned
Answer» C. UV-C
Discussion
14.

Nitrogen also helps in preventing UV rays from reaching the Earth.

A. True
B. False
Answer» B. False
Discussion
15.

Between what altitudes, is the ozone layer found in highest concentrations?

A. 10-20km
B. 20-40km
C. 40-55km
D. 55-70km
Answer» C. 40-55km
Discussion
16.

Who discovered the formation of ozone from photochemical reactions?

A. G.M.B Dobson
B. Sydney Chapman
C. Carl Sagan
D. Henri Buisson
Answer» B. Sydney Chapman
Discussion
17.

The ozone layer absorbs what range of wavelengths of the sun’s radiation?$
A. 0.80 nm – 1.50 nm
B. 200 nm – 315 nm
C. 450 nm – 570 nm
D. 600 nm – 750 nm
Answer» C. 450 nm ‚Äö√Ñ√∂‚àö√ë‚àö¬® 570 nm
Discussion
18.

Which of the following devices can be used to measure ozone in the stratosphere from the ground?

A. Spectrometer
B. Photometer
C. Spectrophotometer
D. Spectro-ozonometer
Answer» D. Spectro-ozonometer
Discussion
19.

Who discovered the ozone layer?
A. Henri Buisson & Charles Fabry
B. Carl Sagan & Charles Fabry
C. G.M.B Dobson
D. Carl Sagan &G.M.B Dobson
Answer» B. Carl Sagan & Charles Fabry
Discussion
20.

What is the average concentration of ozone in the ozone layer of the atmosphere?

A. Nearly 100%
B. Greater than 90%
C. Between 10-50%
D. Less than 10ppm
Answer» E.
Discussion