81. 800 g of a 40% solution by weig...
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81. 800 g of a 40% solution by weight was cooled. 100 g of solute precipitated. The percentage composition of remaining solution is: (a) 31.4% (b) 57.6% (c) 45.8% (d) 41.4%

NEET/Medical Exams
Chemistry
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On'ginal amount it solute in [ begin{aligned} 800 mathrm{gm} &=frac{40}{100} times 800 &=320 mathrm{gm} end{aligned} ] Affer 100 grn preapituted ( 1 quad 320-100 ) remained in toogm ( =220 mathrm{gm} ) " composition of remaining solution ( =frac{220}{700} times 100 ) [ =31.4 % ]
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