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A 0.2 molar aqueous solution of a weak...

A 0.2 molar aqueous solution of a weak acid (HX) is `20%` ionised . The freezing point of the solution is:
`(Given: K_(f)=1.86^(@) C kg" "mol^(-1)" for water")`

A

`-0.45^(@) C`

B

`-0.90^(@) C`

C

`-0.31^(@) C`

D

`-0.05 ^(@) C`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • A 0.2 molal aqueous solution of a weak acid (HX) is 20 percent ionised. The freezing point of this solution is (Given K_(f)=1.86^(@)C" kg mol "^(-1) "for water "

    A
    `-0.45^(@)C`
    B
    `-0.90^(@)C`
    C
    `-0.31^(@)C`
    D
    `-0.53^(@)C`

  • A 0.2 molal aqueous solution of weak acid (HX) is 20% ionised. The freezing point of this solution is (Given, K_(f) = 1.86^(@) C m^(-1) for water)

    A
    `-0.45^(@)C`
    B
    `-0.55^(@) C`
    C
    `-0.90^(@)C`
    D
    `-0.31^(@)C`

  • A 0.2 molal aqueous solution of a weak acid (HX) is 20 per cent ionised .The freezing point of this solution is ( "Given" K_(f)=1.86 " C kg mol"^(-1) " for water") :

    A
    `-0.45^(@)C`
    B
    `-0.90^(@)C`
    C
    `-0.31. ^(@)C`
    D
    ` 0.53 .^(@)C`

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