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Model Paper 3 — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryModel Paper 31 Mark
MCQ
Assertion (A): Moving phase is liquid and stationary phase is solid in paper chromatography.
Reason (R): Paper chromatography is used for analysis of polar organic compounds.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
✓

Answer

Correct option: D.
A is false but R is true.
(d) $A$ is false but $R$ is true.
Explanation: Paper chromatography is a liquid-liquid partition chromatography in which the water adsorbed or chemically bond to cellulose of paper acts as the stationary phase while the mobile phase is another liquid which is usually a mixture of two or three solvents in which water is one of the components.

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