Purity and separating mixtures

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Question 39

Medium

An analytical chemist uses thin-layer chromatography (TLC) to determine the purity of an organic sample $S\,$ and identify its components using three pure reference standards ( $X$ , $Y$ , and $Z$ ). The resulting chromatogram is shown below.

TLC Chromatogram

Which statement is correct?

Sample $S$ is a pure substance containing standard $X$ , with an $R_f$ value of $0.38$ .

Sample $S$ is a mixture containing standards $X$ and $Z$ , with $R_f$ values of $0.38$ and $0.75$ respectively.

Sample $S$ is a mixture containing standards $X$ and $Z$ , with $R_f$ values of $2.67$ and $1.33$ respectively.

Sample $S$ is a pure substance containing standards $X$ and $Z$ , with $R_f$ values of $0.38$ and $0.75$ respectively.

Purity and separating mixtures

Question 39

Purity and separating mixtures Questions

Purity and separating mixtures

Question 39

Purity and separating mixtures Questions