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JEE Mains · Physics · STD 11 - Kinetic theory of gases
  • JEE Mains 2022
  • Medium
  • MCQ

A flask contains argon and oxygen in the ratio of \(3: 2\) in mass and the mixture is kept at \(27^{\circ} C\). The ratio of their average kinetic energy per molecule respectively will be ...........

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Answer & Solution

Correct Answer

(D) \(3:5\)

Step-by-step Solution

Detailed explanation

Average \(K.E./molecule=\frac{f}{2} k T\)

So, \(\frac{K_{A r}}{K_{O_{2}}}=\frac{\frac{3}{2} k T}{\frac{5}{2} k T}=\frac{3}{5}\)