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A solution can be expressed as 25% w/w as well as 20% w/v then mass of 20 ml of such solution is :A. 25 gmB. 8 gmC. 16 gmD. 10 gm |
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Answer» Correct Answer - C `{:(25% w//w,rArr,25 gm " solute in 100 gm solution" ,),(20% w//v,rArr,"20 gm solute in 100 L solution",),(,,"25 gm solute in x ml solution",),(,,x = (25 xx 100)/(20) = 125 ml,):}` `125 ml rarr 100 gm` (For solution) `20 ml rarr x gm` `x = (2000)/(125) = (400)/(25) = (80)/(5) = 16 gm` |
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