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Rf value or ratio of Rf values from distances on a chromatogram

This type of question, asked 5 times: 25 Jul 2022, 29 Jan 2023, 12 Apr 2023, 5 Apr 2024, 9 Apr 2024. All 5 questions below, oldest first.

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  1. Question 1

    25 Jul 2022

    149
    The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance BB from the base line are 3.25 cm3.25\text{ }cm, 2.08 cm2.08\text{ }cm and 1.05 cm1.05\text{ }cm respectively. The ratio of RfR_{f} values of AA to BB is ____

  2. Question 2

    29 Jan 2023

    58
    Following chromatogram was developed by adsorption of compound 'A' on a 6 cm6\text{ }cm TLC glass plate. Retardation factor of the compound ' AA ' is ×10−1\times10^{- 1}

  3. Question 3

    12 Apr 2023

    55
    Three organic compounds A,BA,B and CC were allowed to run in thin layer chromatography using hexane and gave the following result (see figure). The RfR_{f} value of the most polar compound is___ ×10−2\times10^{- 2}

  4. Question 4

    5 Apr 2024

    145
    Using the given figure, the ratio of RfR_{f} values of sample A and sample CC is x×10−2x \times10^{- 2}. Value of xx is_____ .

  5. Question 5

    9 Apr 2024

    146
    In the given TLC, the distance of spot A& BA\&\text{ }B are 5 cm&7 cm5\text{ }cm\& 7\text{ }cm, from the bottom of TLC plate, respectively. RfR_{f} value of BB is x×10−1x \times10^{- 1} times more than AA. The value of xx is ______ .