163. It takes ten minutes to increase the temperature of a body from 70°C to 80°C. Time required to increase the temperature of the body from 60°C to 70°C would be
(a) 10 minutes
(b) More than 10 minutes
(c) Less than 10 minutes
(d) Uncertain
164. A number of images are formed when a burning candle is put before a plane mirror. The brightest image would be the
(a) Last one
(b) Third one
(c) Second one
(d) First one
165. The deficiency of iron in the body causes
(a) Anaemia
(b) Goitre
(c) Trachoma
(d) Glaucoma
166. Sound waves travel faster in the
(a) Air
(b) Iron
(c) Water
(d) Vacuum
167. The other name given to vitamin C is
(a) B-biotin
(b) Ascorbic acid
(c) Pyridoxine
(d) Panthenol
168. Which planet is called the red planet ?
(a) Venus
(b) Saturn
(c) Mercury
(d) Mars
169. Who invented typewriter ?
(a) Stephenson
(b) Shockley
(c) Sholes
(d)BushwelI
170. The inexhaustible source of energy is
(a) Petroleum
(b) Wood
(c) The sun
(d) Oil
171. The source of energy best suited for a developing country like India is the
(a) Oil
(b) Coal
(c) Biogas
(d) Sun
172. The sea of tranquillity is on the
(a) Mars
(b) Moon
(c) Venus
(d) Mercury
173. Which of the following diseases can be prevented by the injection of a toxoid ?
(a) Diphtheria
(b) Whooping cough
(c) Poliomyelitis
(d) Measles
174. When the white light falls on a rose flower, the flower appears red as it
(a) Transmits only the red light
(b) Reflects only the red light and absorbs the remaining ones
(c) Absorbs only the red light and reflects the remaining ones
(d) Absorbs the white light