Assertion :One molal aqueous solution of glucose contains 180g of glucose in 1kg water. Reason: The solution containing one mole of solute in 1000g of solvent is called one molal solution.
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
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 Molality=No. of moles of soluteWt of solvent in kg. Here, No. of moles =Molecular massWt of solvent =180180=1 ∴Molality=11=1 Hence assertion and reason, both are correct, and reason is the correct explanation of assertion.