0.1 M aqueous solution of `K_4[Fe(CN)_6]` will have the same freezing point as 0.1 M aqueous solution of

An aqueous solution of 0.01 M KCl cause the same elevation in boiling point as an aqueous solution of urea. The concetration of urea solution is :

Which of the following 0.1 M aqueous solutions will have the lowest freezing point?

Which of the following 0.10 M aqueous solution will have the lowest freezing point?

Which of the following aqueous solutions will have the lowest freezing point ?

Which of the following aqueous solutions will have highest freezing point?

An electrolyte AB is 50% ionised in aqueous solution. Calculate the freezing point of 1 molal aqueous solution.