1006: Optical fibre works on the principle of
(a) total internal reflection
(b) refraction
(c) scattering
(d) interference
1007: Who was the pioneer of White revolution in India?
(a) Dhiru Bhai Ambani
(b) Verghese Kurien
(c) Swaminathan
(d) S.K. Birla
1008: Cloudy nights are warmer compared to clear cloudless nights, because clouds
(a) prevent cold waves from the sky from descending on Earth
(b) reflect back heat given off by Earth
(c) produce heat and radiate it towards Earth
(d) absorb heat from the atmosphere and send it towards Earth
1009: Which one of the following constitutional Amendments states that the total number of Ministers, including the Prime Minister, in the Council of Ministers shall not exceed fifteen percent of the total number of members of the House of the People?
(a) 90th
(b) 91st
(c) 92nd
(d) 93rd
1010: Among the following, which one lays eggs and does not produce young ones directly?
(a) Kangaroo
(b) Echidna
(c) Whale
(d) Porcupine