1.

Which observation (s) reflect(s) colligative properties ? (i) A 0.5m 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. Choose the correct answer from the codes given below

Answer»

(i), (ii) and (iii)
(i) and (ii)
(ii) and (iii)
(i) and (iii)

Solution :COLLIGATIVE properties DEPENDS upon the no. of PARTICLES. Since methanol is non electrolyte hence CONNOT be considered.


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