156: The half-life of a radio active element is 5 years. The fraction of the radioactive substance that remains after 20 years is
(a) 1/2
(b) 1/4
(c) 1/8
(d) 1/16
157: Water is filled in a container in such a manner that its volume doubles after every five minutes. If takes 30 minutes for the container to be full, in how much time will it be one-fourth full ?
(a) 7 minutes and 30 seconds
(b) 10 minutes
(c) 20 minutes
(d) 25 minutes
158: The pitch of the voice of women is in general
(a) marginally lower than that of men
(b) higher than that of men
(c) much lower than that of men
(d) the same as that of men
159: The term 'M-STRIPES' is sometimes seen in the news in the context of
(a) Captive breeding of Wild Fauna
(b) Maintenance of Tiger Reserves
(c) Indigenous Satellite Navigation System
(d) Security of National Highways
160: With reference to Indian History, the Members of the Constituent Assembly from the Provinces were
(a) directly elected by the people of those Provinces
(b) nominated by the Indian National Congress and the Muslim League
(c) elected by the Provincial Legislative Assemblies
(d) selected by the Government for their expertise in constitutional matters