KVPY SA Exam 2013 Question Paper

Question : 41 of 80

Marks: +1, -0

The weight percent of sucrose (Formula weight

= 342 \g \;\mol ^{-1}

) in an aqueous solution is 3.42. The density of the solution is

1 \g \;\mL^{-1}

, the concentration of sucrose in the solution in

\mol \L ^{-1}

Solution:

3.42 gm sacrose in 100 gm solution

d=1\gm\ml^{-1}

∵\d=\mass/\volume

volume of solution

= 100/1=100\ml

\Molarity =n/v×1000

Molarity

= 3.42/{342×100}×100=0.1

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