11. Consider the following crops of India:
1. Groundnut
2. Sesamum
3. Pearl millet
Which of the above is/are predominantly rainfed crop/crops?
a) 1 and 2 only
b) 2 and 3 only
c) 3 only
d) 1, 2 and 3
Answer. d)
12. When you travel in the Himalayas, you will see the following:
1. Deep gorges
2. U-turn river courses
3. Parallel mountain ranges
4. Steep gradients causing land-sliding.
Which of the above can be said to be the evidence for the Himalayas being young fold mountains?
a) 1 and 2 only
b) 1, 2, and 4 only
c) 3 and 4 only
d) 1, 2, 3 and 4
Answer. d)
13. Normally, the temperature decreases with the increase in height from the Earth’s surface, because
1. The atmosphere can be heated upwards only from the Earth’s surface
2. There is more moisture in the upper atmosphere.
3. The air is less dense in the upper atmosphere.
Select the correct answer using the codes given below:
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Answer. c)
14. The acidification of oceans is increasing. Why is this phenomenon a cause of concern:
1. The growth and survival of calcareous phytoplankton will be adversely affected.
2. The growth and survival of coral reefs will be adversely affected.
3. The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4. The cloud seeding and formation of clouds will be adversely affected.
Which of the statements given above is/are correct?
a) 1, 2, and 3 only
b) 2 only
c) 1 and 3 only
d) 1, 2, 3 and 4
Answer. d)
15. The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere because it absorbs
a) The water vapor of the air and retains its heat.
b) The ultraviolet part of the solar radiation.
c) All the solar radiation.
d) The infrared part of the solar radiation.
Answer. d)
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