What is the correct sequence of the increasing order of freezing points at one atmosphere of the following 1.0 M aqueous solution?
$1 .$ Urea, $2 .$ Sodium chloride, $3 .$ Sodium sulphate, $4 .$ Sodium phosphate.
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vant Hoff factors for urea, NaCl, N a 2 S O 4 and N a 3 P O 4 are 1, 2, 3 and 4 respectively. As Δ T f ∝ i m , so Δ T f for urea, NaCl, N a 2 S O 4 and N a 3 P O 4 are proportional to 1, 2, 3 and 4 respectively. Hence, freezing point order is N a 3 P O 4 < N a 2 S O 4 < N a C l < Urea

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