Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Basics of Organic Chemistry question

2023 · 12 Apr · Shift 1 · Q17
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Basics of Organic Chemistry
  5. /2023 · 12 Apr · Shift 1 · Q17

Basics of Organic Chemistry question

2023 · 12 Apr · Shift 1 · Q17

JEE MainChemistryBasics of Organic ChemistryNumerical+4 / −1
Three organic compounds A, B and C\mathrm{C}C were allowed to run in thin layer chromatography using hexane and gave the following result (see figure). The Rf\mathrm{R}_{\mathrm{f}}Rf​ value of the most polar compound is ‾\underline{\hspace{2cm}}​×10−2\times 10^{-2}×10−2 JEE Main 2023 (Online) 12th April Morning Shift Chemistry - Basics of Organic Chemistry Question 102 English
Numerical answer
View written solutionFree

Correct answer: 25

  1. In thin layer chromatography (TLC), the stationary phase is usually silica gel, which is polar.

  2. The mobile phase here is hexane, which is non-polar.

  3. Therefore:

    • More polar compound interacts more strongly with silica.
    • So it moves less distance up the plate.
    • Hence, the most polar compound has the smallest RfR_fRf​ value.

  4. Recall: Rf=distance travelled by compounddistance travelled by solvent frontR_f = \frac{\text{distance travelled by compound}}{\text{distance travelled by solvent front}}Rf​=distance travelled by solvent frontdistance travelled by compound​

  5. From the given TLC figure, the spot corresponding to the most polar compound is the one that travelled the least distance. Reading the distances from the figure gives: Rf=0.25R_f = 0.25Rf​=0.25

  6. The question asks for the value in the form: ‾×10−2\underline{\hspace{2cm}} \times 10^{-2}​×10−2

    Since 0.25=25×10−20.25 = 25 \times 10^{-2}0.25=25×10−2

  7. Therefore, the required integer is: 252525

PreviousNext

More from Basics of Organic Chemistry

  • Among the following compounds, the one which shows highest dipole moment is2023 · MCQ
  • Given below are two statements : Statement I : Tropolone is an aromatic compound and has 8π electrons. Statement II : π electrons of >C=O group in tropolone is involved in aromaticity. In the light of the…2023 · MCQ
  • Which of the following statement is correct for paper chromatography?2023 · MCQ
  • Which will undergo deprotonation most readily in the basic medium? Includes diagram2023 · MCQ
  • Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Benzene is more stable than hypothetical cyclohexatriene Reason R : The delocalised π electron cloud is attracted more…2023 · MCQ
  • Which of the following conformations will be the most stable?2023 · MCQ
  • The correct order in aqueous medium of basic strength in case of methyl substituted amines is :2023 · MCQ
  • Following chromatogram was developed by adsorption of compound 'A' on a 6 cm TLC glass plate. Retardation factor of the compound 'A' is ​×10−1. Includes diagram2023 · Numerical