Three particles of a solute, A, associate in benzene to form species \( \mathrm{A}_{3} \). Deter...

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Three particles of a solute, A, associate in benzene to form species \( \mathrm{A}_{3} \). Determine the freezing point of \( 0.25 \) molal solution. The degree of association of solute \( A \) is found to be \( 0.80 \). The freezing point of benzene and its cryoscopic constant are \( 5.5^{\circ} \mathrm{C} \) and \( 5.12 \mathrm{~K} \mathrm{molal}^{-1} \), respectively.
(A) \( 49^{\circ} \mathrm{C} \)
(B) \( 4.9^{\circ} \mathrm{C} \)
(C) \( 25^{\circ} \mathrm{C} \)
(D) \( 2.5^{\circ} \mathrm{C} \)
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