3761: Assertion (A) :
Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons.
Reason (R) :
Ammonia can be liquefied at ambient temperatures at low pressures.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
3762: Chanakya, was also known as
(a) Bhattasvamin
(b) Rajasekhara
(c) Vishnugupta
(d) Visakhadatta
3763: Among the following, which one has the minimum population on the basis of data of Census of India, 2001 ?
(a) Puctucherry
(b) Sikkim
(c) Mizoram
(d) Chandigarh
3764: An astronaut weighing 100 kg fires a bullet weighing 1 kg with a gun of 10 kg at the speed of 50 metres/second. What will be the recoil velocity of the gun ?
(a) 5 cm/s
(b) 50 cm/s
(c) 0.5 cm/s
(d) 0.05 cm/s
3765: Chips used in integrated circuits in computers are made of:
(a) Mica
(b) Manganese
(c) Silicon
(d) Zinc