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A solution of 0.816g of a compound ‘A’ dissolved in 7.5g of Benzene freezes at 1.590C . The molecular weight of compound ‘A’ if Kf of benzene is 4.9 and melting point of Benzene is 5.510C

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detailed solution

Correct option is B

It is a colligative property of solutions that is generally proportional to the molality of the added solute. The depression in the freezing point of a solution can be described by the following formula.

ΔTf =  Kf × m

Where

  • ΔTf is the freezing point depression
  • Kf is the cryoscopic constant, and
  • m is the molality.

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