A \( 0.001 \) molal solution of \( \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}...

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A \( 0.001 \) molal solution of \( \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{4}\right] \) in water had a freezing point depression of \( 0.0054^{\circ} \mathrm{C} \). If \( \mathrm{K}_{\mathrm{f}} \) for water is \( 1.80 \), the correct formula for the above compound assuming its complete dissociation is
(A) \( \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{3}\right] \mathrm{Cl} \)
(B) \( \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Cl}_{2} \)
(C) \( \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}\right] \mathrm{Cl}_{3} \)
(D) \( \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{4}\right] \)
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