The root mean square speed of gas molecules at 25K and 1.5×105 Nm-2 is 100.5 ms-1. If the temperature is raised to 100 K and pressure to 6.0 × 105 Nm-2, the root mean square speed becomes.
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a
100.5 ms-1
b
201.0 ms-1
c
402 ms-1
d
1608 ms-1
answer is A.
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Detailed Solution
In such a case there is no change in velocity u=(3RT/M)=(3PV/M)The increase in temperature = 4 times and also the increase in pressure = 4 times. Both of these reinforce each other