Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: One molal aqueous solution of glucose contains 180 g of glucose in 1 kg water. Reason: Solution containing one mole of solute in 1000 g of solvent is called one molal solution.A) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
B) If both Assertion and Reason are true but the reason is not the correct explanation of the Assertion
C) If Assertion is true but Reason is false
D) If both Assertion and Reason are false
Correct Answer: A
Solution :
Molality \[{{F}_{2}}\] If number of moles of solute =1 weight of solvent = 1 kg then, molality = 1, ie. one molal Glucose \[2{{p}_{{{x}^{-}}}}2{{p}_{y}}\]. molecular weight =180 number of moles \[2{{p}_{x}}\] \[2{{p}_{y}}\] weight of water = 1 kg Hence, molality of the solution is one.
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