The colligative properties of a solution depend on

Which of the following is not a colligative property?

Which observation$(s)$ reflect$(s)$ colligative properties?
$(i)$ $A$ $0.5 \ m$ $NaBr$ solution has a higher vapour pressure than a $0.5 \ m$ $BaCl_2$ solution at the same temperature
$(ii)$ Pure water freezes at the higher temperature than pure methanol
$(iii)$ $A$ $0.1 \ m$ $NaOH$ solution freezes at a lower temperature than pure water
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Which among the following is a colligative property?

When $CuSO_4$ is added to a solution of ammonia,what happens to the boiling point and freezing point of the solution?

Which of the following aqueous solutions will exhibit the highest boiling point?