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The correct statements among the following, for a "chromatography" purification method is:

1. Organic compounds run faster than solvent in the thin layer chromatographic plate.
2. Non - polar compounds are retained at top and polar compounds come down in column chromatography.
3. R f of a polar compound is smaller than that of a non - polar compound.
4. R f is an integral value.

Correct answer: R f of a polar compound is smaller than that of a non - polar compound.

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