811: A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is: Food crop - Rat - Snake - Hawk. In this food chain, the highest concentration of the pesticide would accumulate in which one of the following?
(a) Hawk
(b) Food crop
(c) Snake
(d) Rat
812: How dehydration helps in the preservation of food?
(a) Growth of micro-organism is checked
(b) Nutrients are concentrated
(c) Surface of food stuffs becomes hard
(d) Chemical reactions stop in the absence of water
813: Consider the following statements regarding Indian Planning:
1. The second Five-year plan emphasised in the establishment of heavy industries.
2. The Third Five-year plan introduced the concept of import substitution as a strategy for industrialisation.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
814: Which one of the following pairs is not correctly matched?
British Prime Minister : Political Party
(A) Harold Wilson : Conservative Party
(B) Marget Thatcher : Conservative Party
(C) John Major : Conservative Party
(D) James Callaghan : Labour Party
815: Assertion (A):
Areas lying within five to eight degrees latitude on either side of the equator receive rainfall throughout the year.
Reason (R):
High temperatures and high humidity cause convectional rain to fall mostly in the afternoons near the equator.
(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 the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true