A flask contains argon and chlorine in the ratio of $2: 1$ by mass. The temperature of the mixture is…

A flask contains argon and chlorine in the ratio of $2: 1$ by mass. The temperature of the mixture is $27^{\circ} \mathrm{C}$. The ratio of average kinetic energies of two gases per molecule is
  1. $1:1$
  2. $2:1$
  3. $3:1$
  4. $6:1$

Solution

(a) The average kinetic energy of molecules is given by $\mathrm{KE}_{\mathrm{av}}=\frac{3}{2} K T$. So it depends only on temperature $\mathrm{KE}_1: \mathrm{KE}_2=1: 1$ .

Asked in: MHT CET Full Test 1

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