The freezing point of a 4% aqueous solution of X is equal to the freezing point of a 12% aqueous solution of Y. If the…
Solutions · Class 12 · JEE Main Previous Year Question
The freezing point of a 4% aqueous solution of X is equal to the freezing point of a 12% aqueous solution of Y. If the molecular weight of X is A, then the molecular weight of Y will be
- a
2A
- b
A
- c
4A
- d✓
3A
3A
Strategy:\n> Equal freezing points imply equal elevations/depressions in the same solvent. For non-electrolytes, this means identical molalities.\n\nStep 1: Set molalities equal\n.\nLet and .\n\n(where is mass of solvent, which cancels out)\n\nStep 2: Solve for B\n\n\n
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