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 ...........
Pick an option to check your answer.
Answer & Solution
Correct Answer
(D) \(3:5\)
Step-by-step Solution
Detailed explanation
Average \(K.E./molecule=\frac{f}{2} k T\)
So, \(\frac{K_{A r}}{K_{O_{2}}}=\frac{\frac{3}{2} k T}{\frac{5}{2} k T}=\frac{3}{5}\)
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