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The molar conductivity of 0.05 M solutio...

The molar conductivity of 0.05 M solution of weak acid is `16.6Omega^(-1)cm^(-2)mol^(-1).` Its molar conductivity at infinite dilution is `390.7Omega^(-1)cm^(-2)mol^(-1)`. The degree of dissociation of weak acid is

A

0.24

B

0.42

C

0.042

D

0.024

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • Molar conductance of 0.1 M acetic acid is 7 ohm^(-1) cm^2 "mol"^(-1) . If the molar conductance to acetic acid at dinfintie dilution is 380.8 "ohm"^(-1) cm^2 "mol"^(-1) , the value of dissociation constant will be :

    A
    ` 226 xx 10^(-5) "mol dm"^(-3)`
    B
    `1.66xx10^(-3) "mol dm"^(-1)`
    C
    `1.66 xx10^(-2) "mol dm"^(-3)`
    D
    ` 3.33xx10^(-5) "mol dm"^(-3)`

  • Molar conductance of 0.1 M acetic acid is 7 ohm^(-1) cm^(2) "mol"^(-1) . If the molar conductance of acetic acid at infinite dilution is 280 ohm^(-1) cm^(2) "mol"^(-1) , the value of dissoication constant will be:

    A
    `226xx10^(-5) mol dm^(-3)`
    B
    `1.66xx10^(-3) mol dm^(-3)`
    C
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  • Molar conductance of 0. 1 molar aqueous solution of ammonium hydroxide is 9.54 ohm ^(-1) cm ^(2) mol ^(-1). Molar conductance at infinite dilution of ammonium hydroxide is 238 ohm ^(-1) cm ^(2) mol ^(-1) . The degree of ionisation of ammonium hydroxide at 0.1 M concentration is:

    A
    `40. 800%`
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    C
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