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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

CO₂

Green house effect refers to selective energy absorption by CO, in the atmosphere which allows short wavelength energy to pass through but absorbs longer wavelength and reflects heat back to earth. It is caused by carbon dioxide, methane, nitrogen dioxide and water vapour.