Which observation(s) reflect(s) colligative properties?
(1) A 0.5 m NaBr solution has a higher vapour pressure than a 05 m BaCl₂ solution at the same temperature.
(it) Pure water freezes at the higher temperature than pure methanol.
(iit) A 0.1 m NaOH solution freezes at a lower temperature than pure water.
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(i), (ii) and(iii)

(i) and (ii)

(ii) and (iii)

(i) and (iii)

answer is D.

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Detailed Solution

Colligative properties depends upon the no. of particles. Since methanol is non electrolyte hence cannot be considered.

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