Match List-I with List-II
| List-I | List-II |
| (A) Osmotic pressure | (I) Formation of bubbles of nitrogen in the blood |
| (B) Anoxia | (II) Pressure applied on the solution side that just stops the flow of solvent |
| (C) Bends | (III) Impermeable to impurities |
| (D) Cellulose acetate | (IV) Low blood oxygen causes climbers to become weak |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
All four terms come from the behaviour of solutions: two are effects of gas solubility in blood (Henry’s law), and two concern osmosis through a semipermeable membrane.
(A) Osmotic pressure — This matches (II) Pressure applied on the solution side that just stops the flow of solvent. Osmotic pressure is the extra pressure that prevents osmosis; for dilute solutions it is given by π = CRT.
(B) Anoxia — This matches (IV) Low blood oxygen causes climbers to become weak. At high altitudes the partial pressure of oxygen is low, so less oxygen dissolves in the blood and tissues. Climbers become weak and are unable to think properly.
(C) Bends — This matches (I) Formation of bubbles of nitrogen in the blood. Deep sea divers breathe air at high pressure, so more nitrogen dissolves in their blood. When they come up, the pressure falls and nitrogen escapes as bubbles that block capillaries, which is painful and dangerous.
(D) Cellulose acetate — This matches (III) Impermeable to impurities. Cellulose acetate membranes let water pass but hold back dissolved salts and impurities, so they are used for desalination of sea water by reverse osmosis.
Shortcut: The pair (C)–(I) appears in Options (3) and (4), and (A)–(II) then leaves only Option (3).