KVPY 2020-21 SA Exam Previous Papers

Question : 39 of 80

Marks: +1, -0

Among the following, the plot that shows the correct marking of most probable velocity

(V_{MP}),

average velocity

(\ov{V})

, and root mean square velocity

(V_\RMS)

is:

Solution:

V_{{RMS}}=\√{{3 {RT}}/{{M}}}

\ov{V}=\√{{8 R T}/{\πM}}

V_{m p}=\√{{2 R T}/{M}}

So, decreasing order of various molecular speeds is, as

{V}_{{RMS}}>\ov {{V}}>{V}_{{MP}}

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