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At 25^@C molar conductance of 0.1 molar...

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 %`

Text Solution

Verified by Experts

The correct Answer is:
B
`Lambda_(infty)` for acetic acid at infinites dilution `238 "ohm"^(-1) cm^@ "mol"^(-1)`
` Lambda_C` for acetic at conc . `C=9. 54 ohm^(-1) cm^2 "mol"^(-1)`
` :. alpha = (Lambda_C)/(Lambda_(infty)) = (9. 54)/(238) = 4. 0008%`.
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