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60. When temperature of an ideal gas is increased from

27°C  to 227°C , its r.m.s. speed changed from 400 metre/sec to Vs .The  is Vs

(a)  516 metre/sec                  (b)  450 metre/sec

(c)   310 metre/sec                  (d)  746 metre/sec

Answer-a

(5)

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