2236: Assertion (A) :
Sodium metal is stored under kerosene.
Reason (R):
Metallic sodium melts when exposed to air.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is NOT a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
2237: Which one of the following statements is correct with reference to our solar system ?
(a) The Earth is the densest of all the planets in our solar system
(b) The predominant element in the composition of Earth is silicon
(c) The Sun contains 75 per cent of the mass of the solar system
(d) The diameter of the Sun is 190 times that of the Earth
2238: Of the four places marked 1, 2, 3, and 4 of the map, the one indicating a tidal port is
(a) 1
(b) 2
(c) 3
(d) 4
2239: Two persons A and B get the same salary. Their basic pays are different. Their allowances are 65% and 80% of their basic pays respectively. What is the ratio of their basic pays?
(a) 7 : 5
(b) 17 : 15
(c) 11 : 10
(d) 12 : 11
2240: Who led the extremists before the arrival of Gandhiji on the political scene for freedom struggle?
(a) Bal Gangadhar Tilak
(b) Dadabhai Naoroji
(c) Gopal Krishna Gokhale
(d) Subhash Chandra Bose