3456: If water contracts on freezing, which of the following would happen?
(a) Icebergs will completely float on the surface of water
(b) Ice would become more dense
(c) Lakes would freeze from top to bottom
(d) Rocks will crack due to freezing or internal water
3457: The terms Event Horizon, Singularity, 'String Theory and Standard Model are sometimes seen in the news in the context of
(a) Observation and understanding of the Universe
(b) Study of the solar and the lunar eclipses
(c) Placing satellites in the orbit of the Earth
(d) Origin and evolution of living organisms on the Earth
3458: 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
3459: Who of the following organized a march on the Tanjore coast to break the Salt Law in April 1930?
(a) V. O. Chidambaram Pillai
(b) C. Rajagopalachari
(c) K. Kamaraj
(d) Annie Besant
3460: The winter rain in Madras is caused by:
(a) South-West Monsoons
(b) North-East Monsoons
(c) Intense land and sea breezes
(d) Cyclonic winds in the Bay of Bengal