If the mole fraction of solute is 0.75, what is the mole fraction of solvent?
Answer and explanation
Correct answer: 0.25
For a binary solution containing only solute and solvent, the governing relation is xsolute + xsolvent = 1. Rearranging gives xsolvent = 1 − xsolute = 1 − 0.75 = 0.25. Thus option A is correct. Choosing 0.75 incorrectly repeats the solute fraction, 1.75 exceeds the allowed range, and 0.50 does not satisfy the required sum of one.
Frequently asked questions
What is the correct answer to this question?
0.25
Why is this the correct answer?
For a binary solution containing only solute and solvent, the governing relation is xsolute + xsolvent = 1. Rearranging gives xsolvent = 1 − xsolute = 1 − 0.75 = 0.25. Thus option A is correct. Choosing 0.75 incorrectly repeats the solute fraction, 1.75 exceeds the allowed range, and 0.50 does not satisfy the required sum of one.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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