" Which of the following is not a true solution "

Which one of the following is not a true solution ?

Which of the following is a true solution?

which of the following will give a true solution when dissolved in water ?

which of the following will give a true solution when dissolved in water ?

Which of the following is true for a solution showing positive deviation from Raoult's law ?

Which of the following is/are true for a solution containing 30g urea in 100 g water? (K_(f) for water =1.9.^(@)C.kg//mol and K_(b) for water =0.5.^(@)Ckg//mol

Which of the following is/are true for a solution containing 30g urea in 100 g water? (K_(f) for water =1.9.^(@)C.kg//mol and K_(b) for water =0.5.^(@)Ckg//mol