541: Which one of the following regions of the world supplies the maximum of our imported commodities (in terms of rupee value)?
(a) Africa
(b) America
(c) Asia and Oceania
(d) Europe
542: If suitable Scheduled Caste/Tribe candidates are not available, the posts:
(a) May for the time being be filled by other candidates
(b) Are left vacant
(c) Are filled by Other Backward Classes candidates
(d) None of the above
543: What happens when the temperature of water falls from 30°C and 0°C?
(a) The volume of ice formed will be less than volume of water
(b) The volume of ice formed will be more than the volume of water
(c) Water will not freeze at 0°C
(d) None of the above
544: Two important characteristics of a hypothesis are that it should be testable and that it should be stated in a manner that it can be refuted. Which one of the following hypotheses, fulfils these characteristics ?
(a) Intelligent persons have good memory
(b) Some birds are animals
(c) Some businessmen are dishonest
(d) All men are mortal
545: 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