1046: Superconductors are so called because they
(a) Efficiently conduct heat from one hot body to another
(b) Offer no resistance to conduction of heat at high temperatures
(c) Offer no resistance to conduction of electricity at low temperatures
(d) Produce high temperatures while conducting electricity
1047: Which of the following pairs of substances can be completely separated by sublimation ?
(a) Sand and iodine
(b) Ammonium chloride and iodine
(c) Sand and sulphur
(d) Salt and sulphur
1048: Which one of the following pairs is not correctly matched?
Current Name : Old Name
(a) Harare : Salisbury
(b) Ethiopia : Abyssinia
(c) Ghana : Dutch Guiana
(d) Kinshasa : Leopoldville
1049: In which one of the following oceans is Diamantina Trench situated ?
(a) Indian Ocean
(b) Atlantic Ocean
(c) Arctic Ocean
(d) Pacific Ocean
1050: Write the correct chronological order of the following annexations by the Britishers
I. Oudh
II. Punjab
III. Upper Burma
(a) III, II, I
(b) I, II, III
(c) I, III, II
(d) II, I, III