331.

The Narmada river in the Peninsular plateau flows westward with a remarkably straight channel. It is because of the:

• slope gradient in this part controls the river channel pattern.

• the river carries a huge amount of water which has created a straight channel course

• the river forms the boundary between the Central Highlands and the Deccan Plateau.

• the river flows through the trough of a rift valley inclined westward.

No trees are found in the Tundra biome near-polar region of the northern hemisphere. This is due to:

• snowfall inhibits plant respiration.

• frozen ice beneath the surface soil (permafrost) restricts roots growth

• less wind movement and inadequate sunlight:

• low temperature which restricts development of reproductive organs

Why do the summer monsoon winds blow from the southwestern direction in the northern hemisphere?

• The general direction of the wind from the Indian Ocean is south-western

• The presence of the doldrums around the Equator

• The low-pressure condition in north-west India

• Due to the effect of Coriolis force

If the Earth's axis were perpendicular to the plane of its orbit, which one among the following would not have happened?

• The North Pole will always lie in the dark

• Days and nights would be equal throughout the yea

• No change of seasons will take place

• The sun will be perpendicular to the Equato

Match List-I with List-II

List I (Peak in the Eastern Himalaya)

1. Makalu
2. Kanchenjunga
3. Namcha Barwa
4. Mt. Everest

List II (Location in the map)

• (a) - 2, (b) - 3, (c) - 4, (d) - 1

• (a) - 2, (b) - 4, (c) - 3, (d) - 1

• (a) - 1, (b) - 4, (c) - 3, (d) - 2

• (a) - 1, (b) - 3, (c) - 4, (d) - 2

Which one among the following is the best reason for the marked increase· in agricultural production in India in the past decades?

• Increase in the area under cultivation

• Conversion of barren land into agricultural land

• Use of improved agricultural methods and technologies

• Priority status given by the successive governments to agricultural sector over the industry sector

Which of the following statements regarding the Deccan Traps is/are correct?

1. Intense volcanic activity in the form of fissure eruption took place towards the end of the Cretaceous period
2. The volcanic lava spread out in horizontal sheets
3. The regular soil found here is rich in nitrogen

Select the correct answer using the code given below:

• 1 and 2 only

• 1,2 and 3

• 3 only

• 1 only

Consider the following statements

1. The Himalayan vegetation varies according to both altitude and climatic conditions.
2. There are mainly two types of tropical forests that are found in the Himalayas-the tropical rainforests and the tropical deciduous forests

Which of the statements given above is/are correct?

• 1 only

• 2 only

• Both 1 and 2

• Neither 1 nor 2

Examine the statements and choose the correct alternative.

Statement I: Decay and disintegration of rocks in situ is called weathering

Statement II: Mechanical weathering is mainly caused by temperature variation

• Both the statements are individually true and statement II is the correct explanation of statement I

• Both the statements are individually true but statement II is not the correct explanation of statement I

• Statement I is true but Statement II is false

• Statement I is false but statement II is true

Examine the statements and choose the correct alternative.

Statement I: The semi-arid tracts of India stretching from eastern Rajasthan in the north to south-central Tamil Nadu are agriculturally less productive

Statement II: The semi-arid tracts are homeland to a large number of central Indian Scheduled Tribe population

• Both the statements are individually true and statement II is the correct explanation of statement I

• Both the statements are individually true but statement II is not the correct explanation of statement I

• Statement I is true but Statement II is false

• Statement I is false but statement II is true