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

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

A

a for `Cl_(2) lt a ` for `C_(2) H_(6)` but b for `Cl_(2) gt b` for `C_(2) H_(6)`

B

a for `Cl_(2) gt a ` for `C_(2) H_(6)` but b for `Cl_(2) lt b` for `C_(2) H_(6)`

C

a and b for `Cl_(2) gt a` and b for `C_(2) H_(6)`

D

a and b for `Cl_(2) lt a ` and b for `C_(2) H_(6)`

Text Solution

Verified by Experts

The correct Answer is:
B
van der Waals. constant .a. is a measure of intermolecular forces of attraction and .b. is a measure of size of gas molecules. Larger the intermolecular attractions and smaller the size of molecules, more will be the ease of liquefication.
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Knowledge Check

  • a and b are vanderwaal's constant for gases chlorine is more easily liquefied than ethane because

    A
    `a and b for Cl_2 lt a and b for C_2H_6`
    B
    `a for Cl_2 lt a for C_2H_6 but b for Cl_2 gt b for C_2H_6`
    C
    `a for Cl_2 gt a for C_2H_6 but b for Cl_2 lt b for C_2H_6`
    D
    `a and b for Cl_2 gt a and b for C_2H_6`

  • Van der Waal's crystal are :

    A
    very hard
    B
    of high melting point
    C
    non - volatile
    D
    none of the above .

  • The units of the van der Waals' constant 'a' are :

    A
    atm `L^(2) mol^(-2)`
    B
    atm `L^(-2) mol^(-2)`
    C
    atm L `mol^(-1)`
    D
    atm `mol L^(-1)`

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