46. Escape Velocity of Earth is:
11.2 km per sec
10.4 km per sec
1.7 km per sec
3.2 km per sec
47. The Western Disturbances which bring winter rains to North-West India originate in:
Caspian Region
Mediterranean Region
Gulf of Oman
Persian Gulf
48. The Principle ore of Tin is:
Coltan
Cessiterite
Chromite
Columbite
49. The system of 'Iqtas', an assignment of land in lieu of salary was introduced by which ruler of slave dynasty:
Iltutmish
Qutub-ud-din-Aibak
Razia Sultan
Balban
50. English as a medium of Instruction for higher education was introduced by:
Lord William Bentinck
Sir Charles Metcalfe
Lord Auckland
Lord Ellenborongh