QJEEM19Ch9c22: JEE Main 2019 Chemistry - Class 11 JEEM19Ch9c22 Solution: Points I, II and III in the following plot respectively…

Question

Verified Solution • 2025–26 Session moderate

Points I, II and III in the following plot respectively correspond to
(V_mp : most probable velocity)

Accepted Answer

According to the graph,

V_I < V_II < V_III

We know,

V_mp =

\sqrt{\frac{2 R T}{M}}

V_mp (H₂ at 300 K) =

\sqrt{\frac{2 \times R \times 300}{2}}

=

\sqrt{300 R}

V_mp (O₂ at 400 K) =

\sqrt{\frac{2 \times R \times 400}{32}} = \sqrt{25 R}

V_mp (N₂ at 300 K) =

\sqrt{\frac{2 \times R \times 300}{28}} = \sqrt{21.4 R}

∴

V_mp (N₂ at 300 K) < V_mp (O₂ at 400 K) < V_mp (H₂ at 300 K)

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