A flask contains argon and oxygen in the ratio of 3:2 in mass and the mixture is kept at 27°C. The ratio of their average kinetic energy per molecule respectively will be :

see full answer

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*

An Intiative by Sri Chaitanya

3 : 2

9 : 4

2 : 3

1 : 1

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Average K.E./molecule $= \frac{f}{2} kT$
So, $\frac{K_{Ar}}{K_{O_{2}}} = \frac{\frac{3}{2} kT}{\frac{5}{2} kT} = \frac{3}{5}$

If we consider only translational kinetic energy of a molecule, then $\frac{K_{Ar}}{K_{O_{2}}} = \frac{\frac{3}{2} kT}{\frac{3}{2} kT} = \frac{1}{1}$

Watch 3-min video & get full concept clarity