21. The Narmada river flows to the west, while most other large peninsular rivers flow to the east. Why?
1. It occupies a linear rift valley.
2. It flows between the Vindhyas and the Satpuras.
3. The land slopes to the west from Central India.
Select the correct answer using the codes given below.
a) 1 only
b) 2 and 3
c) 1 and 3
d) None
Answer. a)
22. On the planet earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion
a) is bound in the atmosphere as moisture and clouds
b) is found in freshwater lakes and rivers
c) exists as groundwater
d) exists as soil moisture
Answer. c)
23. Consider the following pairs:
1. Nokrek Biosphere Reserve Garo Hills
2. Logtak (Loktak) Lake Barail Range
3. Namdapha National Park Dafla Hills
Which of the above pairs is/are correctly matched?
a) 1 only
b) 2 and 3 only
c) 1, 2 and 3
d) None
Answer. A)
24. Consider the following:
1. Electromagnetic radiation
2. Geothermal energy
3. Gravitational force
4. Plate movements
5. Rotation of the earth
6. Revolution of the earth
Which of the above is responsible for bringing dynamic changes on the surface of the earth?
a) 1, 2, 3, and 4 only
b) 1, 3, 5, and 6 only
c) 2, 4, 5, and 6 only
d) 1, 2, 3, 4, 5 and 6
Answer-D)
25. In the grasslands, trees do not replace the grasses as a part of an ecological succession because of
a) insects and fungi
b) limited sunlight and paucity of nutrients
c) water limits and fire
d) None of the above
Answer. c)
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