A) \[x\]
B) \[2x\]
C) \[4x\]
D) \[x/4\]
Correct Answer: A
Solution :
r.m.s. speed of a gaseous molecule is\[x\]m/sec at a pressure P atm. We know that in kinetic theory of gas r.m.s. speed\[=\sqrt{\frac{3RT}{M}}\] We know\[PV=RT\] then r.m.s. speed\[=\sqrt{\frac{3PV}{M}}\] As temperature is constant. So PV is constant. Hence, r.m.s. speed is also constant. If the pressure is doubled at constant temperature, there is no change in r.m.s. speed.You need to login to perform this action.
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