1216: Assertion (A):
A Chemical reaction becomes faster at higher temperatures.
Reason (R):
At higher temperatures, molecular motion becomes more rapid.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT a correct explanation of A
(c) A is true but R is false
(d) A is fasle but R is true
1217: That the per capita income in India was Rs. 20 in 1867-68, was ascertained for the first time by
(a) M. G. Ranade
(b) Sir W. Hunter
(c) R. C. Dutta
(d) Dadabhai Naoroji
1218: Consider the following statements:
India continues to be dependent on imports to meet the requirement of oilseeds in the country because:
1. Farmers prefer to grow food grains with highly remunerative support prices.
2. Most of the cultivation of oilseed crops continues to be dependent on rainfall.
3. Oils from the seeds of tree origin and rice bran have remained unexploited.
4. It is far cheaper to import oilseeds than to cultivate the oilseed crops.
Which of the statements given above are correct?
(a) 1 and 2
(b) 1, 2 and 3
(c) 3 and 4
(d) 1, 2, 3 and 4
1219: When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because
(a) Water from soil cannot rise to aerial parts
(b) Roots are starved of energy
(c) Tree is infected by soil microbes
(d) Roots do not receive oxygen for respiration
1220: The common ore of aluminium is:
(a) Bauxite
(b) Chromite
(c) Cryolite
(d) Monazite