386: The most reactive among the halogens is
(a) fluorine
(b) chlorine
(c) bromine
(d) iodine
387: On dividing 2272 as well as 875 by 3-digit number N, we get the same remainder. What is the sum of the digits of N?
388: At which one of the following places do two important rivers of India originate, while one of them flows towards north and merges with another important river flowing towards Bay of Bengal, the other one flows towards Arabian Sea?
(a) Mahabaleshwar
(b) Badrinath
(c) Amarkantak
(d) Nasik
389: Permanent hardness of water cannot be removed by:
(a) Boiling
(b) Adding caustic soda
(c) Distillation
(d) Adding soda
390: The light from the Sun reaches the Earth in about
(a) 2 min
(b) 4 min
(c) 6 min
(d) 8 min