Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Environmental Issues

Multiple Choice Questions

121.

The true statement about 'green-house effect' is that it is caused by :

CO₂ only
SO₂ only
CO₂ and SO₂
CO₂, CFC, CH₄ and NO₂ gases

122.

Soil carried by gravity is

alluvial
eolian
colluvial
glacial

123.

Which of the following is not a Green-house gas?

N₂O
CFC
O₃
CO₂

124.

Freon gas causing stratospheric O₃ depletion is mainly released from

refrigerator
automobile
thermal power plant
steel industry

125.

Which of the following diseases is related to cadmium pollution?

Minamata
Pneumoconiosis
Anaemia
Itai- Itai

126.

Nutrient enrichment of a lake will cause

eutrophication
stratification
biomagnification
bioaccumulation

Short Answer Type

127.

What is bioaccumulation?

Multiple Choice Questions

128.

SO₂ pollution is indicated by

Desmodium (grasses)
Sphagnum (mosses)
Usnea (lichens)
Cucurbita (climbers)

129.

Which one of the following is mainly responsible for green houses effect?

SO₂
CO₂
CO
O₂

130.
For a clean environment, which one following is not essential?

Producer

Consumer

Decomposer

Polluter

Polluter

Pollution is any undesirable change in the physical, chemical or biological characteristics of the environment that has the potentiality to harm human life, useful resources and assets. Substances, chemical or factors causing pollution are called pollutants.