When ice melts into water, its -

(A) Volume increases
(B) Mass increases
(C) Volume decreases
(D) Mass decreases

If a boy sitting in a railway train, moving at constant velocity, throws a ball straight up into the air -

(A) the ball will fall in front of him
(B) the ball will fall behind him
(C) the ball will fall into his hand
(D) the ball will not return downwards

If a bar magnet is broken into two pieces, then­:

(A) each will remain a magnet with North-pole at one end and South-pole at the other end
(B) both pieces will lose their magnetism
(C) the longer piece will behave as a bar magnet
(D) one piece will have North-pole on both side, the other will have South-pole on both side

The tube light is felt cooler than the light from a bulb of the same wattage because the -

(A) tube is fixed at a greater height than the bulb
(B) surface area of a tube is larger than that of a bulb
(C) tungsten is not used in the tube
(D) tube consumes less power

At what point the Centigrade and Fahrenheit temperatures are the same?
(A) ${10}^o$
(B) $0^o$
(C) $-{10}^o$
(D) $-{40}^o$

An electronic device makes a beep after every $60$ seconds. Another device makes a beep after every $62$ seconds. They beeped together at $10 \mathrm{A}.\mathrm{M}.$ The next time, when they would beep together at the earliest is: