1966: Plants take nitrogen in the form of:
(a) Nitrites
(b) Ammonia
(c) Nitrates
(d) Element
1967: In how many ways can four children be made to stand in a line such that two of them, A and B are always together ?
(A) 12
(B) 6
(C) 18
(D) 24
1968: A ball bounces higher at high altitudes than in plains. This is because:
(a) The pressure on higher altitudes is lower than that in plains
(b) Downward pull due to gravity is less at higher altitudes
(c) The rarefied air offers less resistance to the ball
(d) You become more energetic at hills, so greater the force applied, higher goes the ball
1969: Ticks and mites are actually
(a) Arachnids
(b) Crustaceans
(c) Insects
(d) Myriapods
1970: In eye donation, which one of the following parts of donor's eye is utilised ?
(a) Iris
(b) Lens
(c) Cornea
(d) Retina