1546: How many times are an hour hand and a minute hand of a clock at right angles during their motion from 1.00 p.m. to 10.00 p.m.?
(A) 10
(B) 18
(C) 20
(D) 9
1547: In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason?
(a) Sea surface temperatures are low
(b) Inter-Tropical Convergence Zone seldom occurs
(c) Coriolis force is too weak
(d) Absence of land in those regions
1548: 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
1549: Who among the following started the newspaper Shome Prakash ?
(a) Surendranath Banerjee
(b) Ishwar Chandra Vidyasagar
(c) Raja Rammohan Roy
(d) Dayanand Saraswati
1550: The highest milk producing breed of goat in India is
(a) Barbari
(b) Jamnapari
(c) Black Bengal
(d) Beetal