Assertion :One molal aqueous solution of glucose contains $180 g$ of glucose in $1 k g$ water. Reason: The solution containing one mole of solute in $1000 g$ of solvent is called one molal solution.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
$M o l a l i t y = \frac{No. of moles of solute}{Wt of solvent in kg.}$
Here, No. of moles $= \frac{Molecular mass}{Wt of solvent}$
$= \frac{180}{180} = 1$
$∴ M o l a l i t y = \frac{1}{1} = 1$
Hence assertion and reason, both are correct, and reason is the correct explanation of assertion.

Hence, the correct option is $(A)$

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Assertion :One molal aqueous solution of glucose contains 180 g of glucose in 1 kg water. Reason: The solution containing one mole of solute in 1000 g of solvent is called one molal solution.

Assertion :One molal aqueous solution of glucose contains $180 g$ of glucose in $1 k g$ water. Reason: The solution containing one mole of solute in $1000 g$ of solvent is called one molal solution.