Match List I with List II:
| List I | List II |
| A. Raoult's law | I. \(\Delta T_b = k_b \times m\) |
| B. Henry's law | II. \(\Delta T_f = k_f \times m\) |
| C. Elevation in boiling point | III. \(p = \chi_ 1p_1^0 + \chi _2p_2^0\) |
| D. Depression in freezing point | IV. \(P = K_H \times \chi \) |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A-III, B-IV, C-I, D-II
A. Raoult’s law — This matches III. p = χ1p1° + χ2p2°. For a solution of volatile liquids, the partial vapour pressure of each component is proportional to its mole fraction (p1 = χ1p1°), and the total vapour pressure is the sum of the two.
B. Henry’s law — This matches IV. p = KH × χ. The partial pressure of a gas over a solution is proportional to its mole fraction in the solution.
C. Elevation in boiling point — This matches I. ΔTb = Kb × m. For a dilute solution ΔTb is proportional to the molality; Kb is the ebullioscopic constant.
D. Depression in freezing point — This matches II. ΔTf = Kf × m. Kf is the cryoscopic constant.