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A weak electrolyte obeys Ostwald's dilut...

A weak electrolyte obeys Ostwald's dilution law. Select the correct statements.

A

A decrease in concentration of weak acid shows an incrase in its degree of dissociation `(alpha) `

B

As ` c to 0, ` the degree of dissociation `(alpha ) ` approaches unity

C

A plot of `alpha ^(2) "versus" (1)/( c ) ` gives a straight line with slope equal to dissociation constant of weak electrolyte

D

A plot of `alpha ^(2) ` versus . C gives a straight line with slope equal to dissociation constant of weak electrolyte

Text Solution

Verified by Experts

The correct Answer is:
D
` K_a =C alpha ^(2) rArr alpha = sqrt(( K_a)/( C )) " as " C to 0,alpha to 1`
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