A flask contains argon and chlorine in the ratio of 2 : 1 by mass. The temperature of the mixture is 27 C . The ratio of root mean square speed of the molecules of the two gases ( V rms Ar V rms Cl ) is: (Atomic mass of argon = 40.0 u and molecular mass of chlorine = 70.0 u )

1. A. 7 4
2. B. 2 7
3. C. 7 2
4. D. 7 2

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