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?

What happens to the boiling point and freezing point of water when sugar is added to it?

Which solution will have the highest boiling point?

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