Purity and separating mixtures

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Question 7
Medium

A student analyzed a sample using thin-layer chromatography (TLC). The resulting chromatogram, alongside reference compounds P and Q, is shown below:

TLC Chromatogram

Which of the following statements is correct?

Sample S is a pure substance because one of its components has the same RfR_fRf​ value as Reference P.

The RfR_fRf​ value of Reference Q is 0.800.800.80, and the chromatogram shows that Sample S contains both Reference P and Reference Q.

Sample S is a mixture containing Reference P and an unidentified compound with an RfR_fRf​ value of 0.600.600.60.

Reference P is more soluble in the mobile phase than Reference Q under these chromatography conditions.

Purity and separating mixtures Questions

  1. GCSE
  2. /Chemistry
  3. /Purity and separating mixtures