Q.

If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be             [2017]

1 halved  
2 tripled  
3 unchanged  
4 doubled  

Ans.

(3)

The value of molal depression constant, Kf is constant for a particular solvent, thus, it will be unchanged when molality of the dilute solution is doubled.