Solutions Question 19
Question: The vapour pressure will be lowest for [CPMT 2004]
Options:
A) 0.1 M sugar solution
B) 0.1 M KCl solution
C) 0.1 M $ Cu{{(NO_3)}_2} $ solution
D) 0.1 M $ AgNO_3 $ solution
Show Answer
Answer:
Correct Answer: C
Solution:
Vapour pressure of a solvent is lowered by the presence of solute in it. Lowering in vapour pressure is a colligative property i.e., it depends on the no. of particles present in the solution. $ Cu{{(NO_3)}_2} $ give the maximum no. of ions. (i.e., 3) so it causes the greatest lowering in vapour pressure of water.
