Question:
Of the following four aqueous solutions, total number of those solutions whose freezing point is lower than that of $0.10 \mathrm{M} \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$ is (Integer answer)
Correct Option: , 4
Solution:
As $0.1 \mathrm{M} \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$ is non-dissociative and rest all salt given are electrolyte so in each case effective molarity $>0.1$ so each will have lower freezing point.