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A sample of drinking water was found to be severely contaminated with chloroform, $CHCl_3$, supposed to be carcinogenic in nature. The level of contamination was 15 ppm (by mass).(i) Express this in percent by mass.

1 Answer

$1.5\times 10^{-3}\%$
Hence (A) is the correct answer.
answered Jun 6, 2014 by sreemathi.v