Cryoscopic constant for benezene is 4.9 ...

Cryoscopic constant for benezene is `4.9 K kg mol^(-1)` . Freezing point of benezene is 278.6 K. 4 grams of benzoic acid when dissolved in 50 g of benezene, the freezing point is 276.98K. Calculate the extent of association of benzoic acid in benezene .

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The correct Answer is:

`0.99 `

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