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2.44 g 'w' g of the benzoic acid dissolv...

2.44 g 'w' g of the benzoic acid dissolved in 30 g of benzene shows depression in freezing equal to 2K. If the percentage association of the acid to form polymer `(C_(6)H_(5)COOH)_(n)` in the solution is 80, then find numerical value of n. (Given that `K_(f) = 5K kg mol^(-1)`, Molar mass of benzoic acid `= 122 g mol^(-1)`)

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The correct Answer is:
1

`I = (0.8)/(n) + 0.2 = (2)/(5 xx 0.6)`
`Delta T_(f) = ik_(f)m , n = 2`
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