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Multiple Choice Question with Only One Choice Correct
Two satellites A and B are orbiting around the earth in circular orbits of the same radius. The mass of A is 16 times that of B. The ratio of the period of revolution of B to that of A is

(a)	1 : 16	(b)	1 : 4
(c)	1 : 2	(d)	1 : 1

Chemistry

Multiple Choice Question
For the reaction N₂(g) + 3H₂(g)

2NH₃(g),

H = -ve. The formation of NH₃(g) is favoured at

(a)	high pressure and low temperature	(b)	low pressure and high temperature
(c)	low pressure and low temperature	(d)	high pressure and high temperature

Mathematics

An unbaised die is tossed until a number greater than 4 appears. The probability that an even number of tosses is needed is

(a)	1/2	(b)	2/5
(c)	1/5	(d)	2/3

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