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Environmental Issues

Multiple Choice Questions

71.

The soil which is transported by wind is known as

colluvial
eolian
aluvial
glacial soil

72.

In the treatment of waste water discharge, which treatment stage involves biological treatment?

Primary treatment
Secondary treatment
Tertiary treatment
Reverse osmosis stage

73.

Ozone depletion in stratosphere would result in

forest fires
global warming
skin cancer incidence
None of the above

74.

A lake with nutrients is called

trophic
euphotic
oligotrophic
eutrophic

75.

According to Kyoto protocol the major nations abide to reduce concentration of green house gases by

2008
2010
2012
2018

76.

Bio- indicators are used for

oxygen demand
air pollution
mineral present
All of the above

77.

At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation?

66 $°$ North and South
$22 \frac{1}{2} °$ North and South
40 $°$ North and South
$42 \frac{1}{2} °$ North and South

78.
More than 70% of world's freshwater is contained in

Antartica

Glaciers and Mountains

Greenland

Polar ice

Polar ice

Three fourth surface of earth (about 71 % of total) is occupied by oceans which contain 97.5% of total water. This is marine water with about 3.5% salt contents. Rest water i.e., 2.5% is freshwater, which occurs on land. Most amount of this water (about 1.97%) occurs as frozen ice caps and glaciers and 0.5% freshwater occurs as ground water.