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a' and 'b' are van der Waals constants f...

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

A

a and b for `Cl_2ltaandb` for `C_2H_6`

B

a for `Cl_2lta` for `C_2H_6` but b for `Cl_2gtb` for `C_2H_6`

C

a for `Cl_2gta` for `C_2H_6` but b for `Cl_2ltb` for `C_2H_6`

D

a and b for `Cl_2gtaandb` for `C_2H_6`

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The correct Answer is:
C
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