Consider equimolal aqueous solutions of the following compounds: Urea, Glucose, NaCl, Na 2 SO 4, Sugar , Al 2( SO 4)3, K 2 SO 4 How many of the above aqueous solutions will have greater depression in freezing point than that of aqueous solution of non-volatile, nonelectrolyte solute (molar mass =120 g mol -1 ) of the same concentration?

Question

Consider equimolal aqueous solutions of the following compounds: Urea, Glucose, NaCl, Na 2 SO 4, Sugar , Al 2( SO 4)3, K 2 SO 4 How many of the above aqueous solutions will have greater depression in freezing point than that of aqueous solution of non-volatile, nonelectrolyte solute (molar mass =120 g mol -1 ) of the same concentration? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Depression in freezing point is a colligative property and depends on the number of particles. Among the given, the aqueous solutions of NaCl , Na 2 SO 4, Al 2( SO 4)3 and K 2 SO 4 will give more particles than the aqueous solution of nonvolatile, non-electrolyte solute of the same concentration.