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  4. The units of constant ' a ' in van der Waal's equation is

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Q. The units of constant ' $a$ ' in van der Waal's equation is

States of Matter

Solution:

Unit of $P \equiv \frac{n^2 a}{V^2} ; a \equiv \frac{P V^2}{n^2}=$ atm dm$ ^6 mol ^{-2}$