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

Practical Organic Chemistry question

2024 · 29 Jan · Shift 2 · Q12
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. /Practical Organic Chemistry
  5. /2024 · 29 Jan · Shift 2 · Q12

Practical Organic Chemistry question

2024 · 29 Jan · Shift 2 · Q12

JEE MainChemistryPractical Organic ChemistryMCQ+4 / −1
Chromatographic technique/s based on the principle of differential adsorption is / are A. Column chromatography B. Thin layer chromatography C. Paper chromatography Choose the most appropriate answer from the options given below:
  1. A
    B only
  2. B
    A only
  3. C
    A & B only
  4. D
    C only
View written solutionFree

Correct answer: C

  1. Identify the principle asked in the question

    The question asks which chromatographic techniques are based on differential adsorption.

    • In adsorption chromatography, separation occurs because different substances are adsorbed to different extents on the surface of a solid stationary phase.

  2. Check each technique

    A. Column chromatography

    • In column chromatography, the stationary phase is usually silica gel or alumina.
    • These are solid adsorbents.
    • Components move at different rates because they are adsorbed differently.

    Hence, A is based on differential adsorption.

    B. Thin layer chromatography (TLC)

    • In TLC, the stationary phase is again usually silica gel or alumina coated on a plate.
    • Separation occurs due to different extents of adsorption of components on the solid surface.

    Hence, B is also based on differential adsorption.

    C. Paper chromatography

    • In paper chromatography, the stationary phase is water held in the fibers of paper.
    • Separation occurs mainly by partition between the stationary liquid phase and the mobile phase.

    Hence, C is not based on differential adsorption.

  3. Conclusion

    Techniques based on differential adsorption are: A and B\boxed{A \text{ and } B}A and B​

  4. Match with the given options

    • Option A: B only
    • Option B: A only
    • Option C: A & B only
    • Option D: C only

    Therefore, the correct option is: Option C\boxed{\text{Option C}}Option C​

PreviousNext

More from Practical Organic Chemistry

  • On a thin layer chromatographic plate, an organic compound moved by 3.5 cm, while the solvent moved by 5 cm. The retardation factor of the organic compound is ​×10−1.2024 · Numerical
  • Match List I with List II Choose the correct answer from the options given below: Includes table2024 · MCQ
  • The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable…2024 · MCQ
  • Given below are two statements : Statement I : Sulphanilic acid gives esterification test for carboxyl group. Statement II : Sulphanilic acid gives red colour in Lassigne's test for extra element detection. In the light of the above…2023 · MCQ
  • Match List I with List II Choose the correct answer from the options given below: Includes table2023 · MCQ
  • Given below are two statements: Statement I : Methyl orange is a weak acid. Statement II : The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form. In the light of the above statement, choose the most…2023 · MCQ
  • A compound 'X' when treated with phthalic anhydride in presence of concentrated H2​SO4​ yields 'Y'. 'Y' is used as an acid/base indicator. 'X' and 'Y' are…2023 · MCQ
  • Given below are two statements: Statement I : Aqueous solution of K 2​ Cr 2​ O 7​ is preferred as a primary standard in volumetric analysis over Na 2​ Cr 2​ O 7​ aqueous solution. Statement II : K 2​ Cr 2​ O 7​ has a…2023 · MCQ