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JEE Main 2011

Exam: JEE Main
Year: 2011
Subject: Chemistry
Chapter: States of Matter

JEE Main 2011 · Chemistry · States of Matter

'a' and 'b' are van der Waals' constants for gases. Chlorine is...

'a' and 'b' are van der Waals' constants for gases. Chlorine is more easily liquefied than ethane because

Options

Aa and $b$ for $\mathrm{Cl}_2 < \mathrm{a}$ and $\mathrm{b}$ for $\mathrm{C}_2 \mathrm{H}_6$
Ba for $\mathrm{Cl}_2 <$ a for $\mathrm{C}_2 \mathrm{H}_6$ but b for $\mathrm{Cl}_2>$ b for $\mathrm{C}_2 \mathrm{H}_6$
Ca for $\mathrm{Cl}_2>$ a for $\mathrm{C}_2 \mathrm{H}_6$ but $b$ for $\mathrm{Cl}_2 <$ b for $\mathrm{C}_2 \mathrm{H}_6$
Da and $b$ for $\mathrm{Cl}_2>a$ and $b$ for $\mathrm{C}_2 \mathrm{H}_6$

Correct answer

C. a for $\mathrm{Cl}_2>$ a for $\mathrm{C}_2 \mathrm{H}_6$ but $b$ for $\mathrm{Cl}_2 <$ b for $\mathrm{C}_2 \mathrm{H}_6$

Step-by-step solution

ease of liquefaction

\propto \frac{a}{b}

for ethane

a=5.49, b=0.0638

for

\mathrm{Cl}_2 \mathrm{a}=6.49, \mathrm{~b}=0.0562

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