246: Which one of the following pairs is NOT correctly matched ?
(a) Holt Machenzie : Mahalvari settlement in Northern India
(b) Lord Cornwallis : Subsidiary system
(c) Lord Ripon : Local Self-Government
(d) Thomas Munro : Ryotwari settlement
247: During the time of which Mughal Emperor did the English East India Company establish its first factory in India?
(a) Jahangir
(b) Akbar
(c) Shahjahan
(d) Aurangzeb
248: The January isotherm taken as a basis for dividing India into tropical and sub-tropical zones is
(a) 21°C
(b) 18°C
(c) 12°C
(d) 15°C
249: 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
250: A small weight put on the pressure cooker increases the pressure of steam because:
(a) It is air tight
(b) Area of contact is very small
(c) Density of metal is very high
(d) Pressure builds up irrespective of the weight placed