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A solution is made from 35 ml of methanol and 65 ml of water. What is the volume percentage of methanol?
A65%
B53.8%
C35%
D100%
Answer & Solution
Correct answer: C. 35%
1. Volume percentage = volume of solute / volume of solution x 100, where solution volume = solute + solvent.
2. Volume of solution = 35 + 65 = 100 ml.
3. Volume percentage = (35 / 100) x 100 = 35%.
4. The value 53.8% wrongly divides 35 by 65 (the water alone) instead of the total volume.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 9 Solutions "Volume percentage", p.139_
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