Chemistry · 2012
NEET 2012 · Mains · Code C · Q96
For real gases van der Waals equation is written as (p+(a n^2)/V^2)(V-n b)=n R T where ' a ' and ' b ' are van der Waals constants. Two sets of gases…
For real gases van der Waals equation is written as
$$\left(p+\frac{a n^2}{V^2}\right)(V-n b)=n R T
$$where ' $\displaystyle a$ ' and ' $\displaystyle b$ ' are van der Waals constants.
Two sets of gases are :
(I)
$\displaystyle \mathrm{O}_2, \mathrm{CO}_2, \mathrm{H}_2$ and He
(II)
$\displaystyle \mathrm{CH}_4, \mathrm{O}_2$ and $\displaystyle \mathrm{H}_2$
The gases given in set-I in increasing order of 'b' and gases given in set-II in decreasing order of 'a', are arranged below. Select the correct order from the following :
Official answer
(1)
(I) $\displaystyle \mathrm{H}_2<\mathrm{He}<\mathrm{O}_2<\mathrm{CO}_2$ (II) $\displaystyle \mathrm{CH}_4>\mathrm{O}_2>\mathrm{H}_2$
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NEET (UG) 2012 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.