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Calculate the molal depression constant ...

Calculate the molal depression constant of a solvent which has freezing point `16.6^(@)C` and latent heat of fusion `180.75 "J g"^(-1)` :

A

2.68

B

3.86

C

4.68

D

2.86

Text Solution

Verified by Experts

The correct Answer is:
B
`K_(f)=(RT_(0)^(2))/(1000L)" "T_(0)=273+16.6=289.6K`
`=(8.314xx(289.6)^(2))/(1000xx180.75)=3.86`]
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Knowledge Check

  • Calculate the molal depression constant of a solvent which has freezing point 16.6^(@)C and latent heat of fusion 180.75 Jg^(-1)

    A
    `2.68`
    B
    `3.86`
    C
    `4.68`
    D
    `2.86`

  • Statement - I. Greater the molal depression constant of the solvent used less in the freezing point of the solution. Statement - II. Depression in freezing point depends upon the nature of the solvent.

    A
    Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
    B
    Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
    C
    Statement-1 is true, statement-2 is false.
    D
    Statement-1 is false, statement-2 is true.

  • The molal depression constant for a solvent is 4.9. The depression in freezing point for a millimolal solution of a non-electrolyte in the solvent is

    A
    0.49
    B
    4.9
    C
    4.9 + 0.001
    D
    0.0049.

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