a' and b' are van der Waals' constants for gases. Chlorine is more easily liquefied than ethane because: - Chemistry MCQ FIITJEE AIEEE 2011 (Set Q) 2026 | ExamTest.live | ExamTest.live

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

A $a and b for Cl_{2} < a and b for C_{2} H_{6}$
B $a for Cl_{2} < a for C_{2} H_{6} but b for Cl_{2} > b for C_{2} H_{6}$
C $a for Cl_{2} > a for C_{2} H_{6} but b for Cl_{2} < b for C_{2} H_{6}$
D $a and b for Cl_{2} > a and b for C_{2} H_{6}$

Solution & Step-by-step Explanation

Liquefaction is easier if intermolecular forces are stronger. The van der Waals constant ' a' measures the magnitude of intermolecular attractive forces.Ethane (C_{2} H_{6}) has a \approx 5.5 and Chlorine (Cl_{2}) has a \approx 6.5 .Since ' a' is higher for Cl_{2}, it is more easily liquefied. Also, ' b' (excluded volume) depends on size; Cl_{2} has a smaller ' b' than ethane.

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

A

a and b for Cl_{2} < a and b for C_{2} H_{6}

B

a for Cl_{2} < a for C_{2} H_{6} but b for Cl_{2} > b for C_{2} H_{6}

C

a for Cl_{2} > a for C_{2} H_{6} but b for Cl_{2} < b for C_{2} H_{6}

D

a and b for Cl_{2} > a and b for C_{2} H_{6}

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