Boiling point of a 2% aqueous solution of a nonvolatile solute A is equal to the boiling point of 8% aqueous solution…
Solutions · Class 12 · JEE Main Previous Year Question
Boiling point of a 2% aqueous solution of a nonvolatile solute A is equal to the boiling point of 8% aqueous solution of a non-volatile solute B. The relation between molecular weights of A and B is.
- a
- b✓
- c
- d
Strategy:\n> Solutions with equal boiling points have equal elevations in boiling point (). For non-electrolytes relative to the same solvent, this implies identical molalities.\n\nStep 1: Set molalities equal\n\nWhere is mass of solute and is mass of solvent.\n- For solution A: 2 g solute A in 98 g solvent.\n- For solution B: 8 g solute B in 92 g solvent.\n\nStep 2: Substitute and solve for ratio\nAssuming dilute solutions (where ):\n\n\n
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