Question

The solution having lowest freezing point is

• A. 0.1 M potassium chloride
• B. 0.1 M potassium sulphate
• C. 0.1 M potassium nitrate
• D. 0.1 M aluminium sulphate

Answer 1

Answer: (D)

0.1 M aluminium sulphate

Answer 2

Depression in freezing point is a colligative property. Higher the value of i, higher will be depression in freezing point and lowest will be the freezing point of solution. For � ${KCl, }$ � � � � � � $i = 2$ � � � ${KNO_3, }$ � � � $� � � i = 2$ � � � ${K2SO4 }$ � � � � $i = 3$ � � � ${Al_2(SO_4)_3}$ � � � $i = 5$