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Molar conductance of 0. 1 molar aqueous ...

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%`

B

`2. 080%`

C

`20. 800% `

D

`4. 008% `

Text Solution

Verified by Experts

The correct Answer is:
D
`% alpha = ( lamda ^(c))/( lamda ^(oo)) xx 100 = ( 9. 54 )/(238) xx 100 = 4 .088%`
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Knowledge Check

  • At 25^(@)C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm^(-1) cm^(2) mol^(-1) and at infinte dilution its molar conductance is 238 ohm^(-1) cm^(2) mol^(-1) The degree of ionisation of ammonium hydroxide at the same concentration and termperature is

    A
    `20.800%`
    B
    `4.008%`
    C
    `40.800%`
    D
    `2.080%`

  • At 25^(@)C molar conductance of 0.1 molar aqueous solution of ferrous hydroxide is 9.54 ohm^(-1) cm^(2) mol^(-1) and at infinite dilution its molar conductance is 238 ohm^(-1) cm^(2) mol^(-1) . The percentage degree of ionisation of ferrous ydroxide at the same concentration and temperature is

    A
    `20.800%`
    B
    `4.008%`
    C
    `40.800%`
    D
    `2.080%`

  • At 25^@C molar conductance of 0.1 molar qqueous solution of ammonimum bhydroxide si 9.54 "ohm"^(-1) cm^2 "mol"^(-1) and at infinite dilution its molar conductance si 238 "ohm"^(-1) cm^2 "mol"^(-1) . The degree of ionisatiov and temperature is .

    A
    ` 20. 800 %`
    B
    ` 4 . 008 %`
    C
    ` 40 . 800 %`
    D
    ` 2 . 080 %`

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