200g. Of 5% solution (by mass) of the solute A is mixed with 300 g. of a 10% solution (by mass) of solute B. The mass percent of A and B in the mixtures are respectively

Options

A. 3 and 5
B. 5 and 10
C. 2 and 6
D. 6 and 12

Answer

C

Explanation

200 g of 5% solution of A contains 10 g of A & 300 g. of 10% solution of B contains 30 g of B. Both these W ts. Are finally present in 500 g of mixture .
:. % Mass of `A= (10 xx 100)/500=2
` "and "% "Mass of" B = (30 xx 100)/500=6`