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The respective speeds of the molecules are 1, 2, 3, 4 and 5 km/sec. The ratio of their rms velocity

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The respective speeds of the molecules are 1, 2, 3, 4 and 5 km/sec. The ratio of their rms velocity and the average velocity will be : 

(a) 1 : 3 

(b) 3 : 4 

(c) 3 : √11 

(d) √11 : 3

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Best answer

Correct option (d)√11 : 3

Explanation:

The rms velocity of the molecules is 

Now the average velocity of molecules is

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