Question

Which observation(s) reflect(s) colligative properties?

(i) A 0.5 m NaBr solution has a higher vapour pressure than a 0.5 m BaCl₂ solution at the same temperature.

(ii) Pure water freezes at a higher temperature than pure methanol.

(iii) A 0.1 m NaOH solution freezes at a lower temperature than pure water.

Options

• (i), (ii) and (iii)

• (i) and (ii)

• (ii) and (iii)

• (i) and (iii)

Answer 1

(i) and (iii)