Q 1280391217.     One molal solution of a carboxylic acid in benzene shows the elevation of boiling point of `1.518` `K`. Find the degree of association of the acid in benzene. (`K_f` for benzene `= 2.53` `K` `kg` `mol^(–1)`):

A

`75%`

B

`70%`

C

`60%`

D

`80%`

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