A container has 3 gases whose mass ratio is 1:3:5. What is the ratio of mean square speed of the molecules of two gases? Their atomic masses are 20u, 30u & 40u corresponding to the order in which the ratios are given.(a) 2:3:4(b) 4:3:2(c) 2:√3:√2(d) √2:√3:2I had been asked this question by my school principal while I was bunking the class.This is a very interesting question from Kinetic Theory of an Ideal Gas topic in chapter Kinetic Theory of Physics – Class 11

A container has 3 gases whose mass ratio is 1:3:5. What is the ratio o

1.	A container has 3 gases whose mass ratio is 1:3:5. What is the ratio of mean square speed of the molecules of two gases? Their atomic masses are 20u, 30u & 40u corresponding to the order in which the ratios are given.(a) 2:3:4(b) 4:3:2(c) 2:√3:√2(d) √2:√3:2I had been asked this question by my school principal while I was bunking the class.This is a very interesting question from Kinetic Theory of an Ideal Gas topic in chapter Kinetic Theory of Physics – Class 11
Answer» The correct OPTION is (b) 4:3:2 The BEST I can explain: Their average kinetic energies will be the same.Thus, 1/2mv^2will be the same. v1^2:v2^2:v3^2 =m3:m2:m1 = 40:30:20 = 4:3:2.

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