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MHT CET202616 April 2026Evening ShiftChemistrySolutionsActual

The normal boiling point of Ethyl acetate is 77^ C . A solution of non-volatile non-electrolyte solute in ethyl acetate boils at 78^ C . K_b for ethyl acetate is 2.77 ^ C kg mol ⁻¹ . What is the molality of the solution ?

Options

  1. A0.361 m
  2. B0.052 m
  3. C0.075 m
  4. D0.25 m

Correct answer

A. 0.361 m

Step-by-step solution

The elevation in boiling point is given by T_b = T_b - T_b^ Substituting the given values: T_b = 78^ C - 77^ C = 1^ C For a non-volatile, non-electrolyte solute, the elevation in boiling point is related to molality m by the formula T_b = K_b m 1 = 2.77 m m = 1 2.77 = 0.361 m Answer: 0.361 m

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