Question

# Assertion :If in a solution, solute is 20% by weight, then it is 25% by the weight of the solvent. Reason: Solution also includes weight of solute and thus, pure solvent is 80 g which contains 20 g of solute.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

## The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion20% by weight of solution means 100 g of the solution contains 20 g of solute. The mass of the solvent is 100−20=80g.The percentage by weight of solvent will be 2080×100=25%.Thus, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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