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Boiling point elevation depends on
Athe size of solute particles (typical)
Bthe molal concentration of solute particles
Cthe colour of solute
Dthe volume of solution
Answer & Solution
Correct answer: B. the molal concentration of solute particles
1. Boiling-point elevation ΔT_b = K_b · m is a colligative property.
2. It is determined by the number of solute particles per kg of solvent, not their identity.
3. Hence molal concentration (m) drives ΔT_b.
_Source: Maharashtra Balbharati Std XII Chemistry, Ch 2 "Solutions" §2.7_
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