2066: A box contains 5 sets of balls while there are 3 bails in each set. Each set of balls has one colour which is different from every other set. What is the least number of balls that must be removed from the box in order to claim with certainty that a pair of bails of the same colour has been removed?
(A) 6
(B) 7
(C) 8
(D) 9
2067: Lucerne is a:
(a) Foliage crop
(b) Cereal crop
(c) Fruit crop
(d) Fibre crop
2068: Match List I with List II and select the correct answer using the codes given below the Lists :
List I-------------List II
(Rivers)----------(Dams)
I. Cauvery--------(A) Alamatti
II. Krishna--------(B) Mettur
III. Narmada------(C) Gandhi Sagar
IV. Chambal-------(D) Sardar Sarovar
Codes:
(a) I-A, II-D, III-B, IV-C
(b) I-B, II-A, III-D, IV-C
(c) I-B, II-A, III-C, IV-D
(d) I-A, II-C, III-D, IV-B
2069: The staple commodities of export by the English East India Company from Bengal in the middle of the 18th century were
(a) Raw cotton, oil-seeds and opium
(b) Sugar, salt, zinc and lead
(c) Copper, silver, gold, spices and tea
(d) Cotton, silk, saltpetre and opium
2070: Salinization occurs when the irrigation water accumulated in the soil evapo- rates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?
(a) It greatly increases the crop production.
(b) It makes some soils impermeable.
(c) It raises the water table.
(d) It fills the air spaces in the soil with water.