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

231.

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

232.

Soil carried by gravity is

alluvial
eolian
colluvial
glacial

233.

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

N₂O
CFC
O₃
CO₂

234.

Freon gas causing stratospheric O₃ depletion is mainly released from

refrigerator
automobile
thermal power plant
steel industry

235.

Which of the following diseases is related to cadmium pollution?

Minamata
Pneumoconiosis
Anaemia
Itai- Itai

236.

Nutrient enrichment of a lake will cause

eutrophication
stratification
biomagnification
bioaccumulation

Short Answer Type

237.

What is bioaccumulation?

Multiple Choice Questions

238.
SO₂ pollution is indicated by

Desmodium (grasses)

Sphagnum (mosses)

Usnea (lichens)

Cucurbita (climbers)

Usnea (lichens)

Lichens are widely used as environmental indicators or bio-indicators. Lichens are injured by sulphur dioxide (SO2). Lichens have also shown sensitivity to some other pollutants, such as heavy metals and Other Gaseous Toxics in Air , but for the most part lichen damage can be attributed to SO2.