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UPSC PREVIOUS YEAR QUESTIONS 1. Solar eclipse occurs when? a) Earth comes between sun and moon b) Moon is at right angle to the earth c) Moon comes between sun and earth d) Sun comes between moon and earth 2. When a man circles round the earth in a satellite, then? a) His mass becomes zero but weight remains constant b) Mass remains constant but weight becomes zero c) Both mass and weight remain constant d) Both mass and weight remain zero 3. The weight of an object at the poles is greater than at the equator. This is because? a) Of the shape of the earth b) The attraction of the moon is maximum at the earth’s surface c) The attraction of the sun is maximum at the earth’s surface d) Gravitational pull is more at the poles 4. The first metal used by the man was? a) Iron b) Copper c) Aluminium d) Gold 5. Gobar gas contains mainly? a) Carbon dioxide b) Methane c) Ethylene d) Carbon monoxide 6. The content of w