Ncert Exercises & Solutions

Isotonic solutions must have the same:

(a)	Solute
(b)	Density
(c)	Elevation in boiling point
(d)	Depression in freezing point

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, d)

Hint: For isotonic solutions, colligative properties are the same.

lsotonic solutions have the same osmotic pressure and same concentration. Elevation in boiling point and depression in freezing

point is the colligative properties. These two colligative properties depend upon concentration.

As the molar concentration is the same for isotonic solutions, so elevation in boiling point and depression in freezing point of

isotonic solutions must be the same.