Correct statement about the following solutions (Assuming one mole of each solute is dissolved in 1 L solution)

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Osmotic pressure : $C a_{3} {(P O_{4})}_{2} > B a C l_{2} > N a C l > {(N H_{2})}_{2} C O$

Freezing point : $N a C l > {(N H_{2})}_{2} C O > C a_{3} {(P O_{4})}_{2} > B a C l_{2}$

Freezing point : ${(N H_{2})}_{2} C O < N a C l < C a_{3} {(P O_{4})}_{2} < B a C l_{2}$

Boiling point : $N a C l < {(N H_{2})}_{2} C O < C a_{3} {(P O_{4})}_{2} < B a C l_{2}$

answer is A.

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Detailed Solution

For (1)
NaCl (i = 2) ; Urea (i = 1)
$C a_{3} {(P O_{4})}_{2} (i = 5); B a C l_{2} (i = 3)$
$∴$ Osmotic pressure and elevation in boiling point, both are colligative properties and order is same for both the cases.

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