JEE Main 2022 · 29 Jun · Shift 1 · Physics Q42

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PhysicsSingle correct+4 / -1Question 42 of 90

In van dar Wall equation $\left[P+\dfrac a{V^2}\right][V-b]=RT$ ; P is pressure, V is volume, R is universal gas constant and T is temperature. The ratio of constants $\dfrac ab$ is dimensionally equal to :

\dfrac PV

\dfrac VP

^3

Answer and worked solution

Official answer: C

Dimensions. $a\sim PV^2$ and $b\sim V$ , so $\frac ab\sim PV$ .

(C)

Topics:Dimensional analysis Ideal gas equation

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JEE Main 2022 · 29 Jun · Shift 1, Physics question 42