16. consider the following:
1. Star tortoise
2. Monitor lizard
3. Pygmy hog
4. Spider monkey
Which of the above are naturally found in India?
a) 1, 2, and 3 only
b) 2 and 3 only
c) 1 and 4 only
d) 1, 2, 3 and 4
Answer. A)
17. Which of the following can be found as pollutants in the drinking water in some parts of India?
1. Arsenic
2. Sorbitol
3. Fluoride
4. Formaldehyde
5. Uranium
Select the correct answer using the codes given below.
a) 1 and 3 only
b) 2, 4, and 5 only
c) 1, 3, and 5 only
d) 1, 2, 3, 4 and 5
Answer. c)
18. Consider the following animals:
1. Sea cow
2. Sea horse
3. Sea-lion
Which of the above is/are mammal/mammals?
a) 1 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2 and 3
Answer. b)
19. With reference to the usefulness of the by-products of the sugar industry, which of the following statements is/are correct?
1. Bagasse can be used as biomass fuel for the generation of energy.
2. Molasses can be used as one of the feedstocks for the production of synthetic chemical fertilizers.
3. Molasses can be used for the production of ethanol.
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)
20. Variations in the length of day time and night time from season to season are due to
a) the earth’s rotation on its axis
b) the earth’s revolution around the sun in an elliptical manner
c) latitudinal position of the place
d) the revolution of the earth on a tilted axis
Answer. d)
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