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

2021 · 25 Feb · Shift 1 · Q15
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. /2021 · 25 Feb · Shift 1 · Q15

Basics of Organic Chemistry question

2021 · 25 Feb · Shift 1 · Q15

JEE MainChemistryBasics of Organic ChemistryNumerical+4 / −1
Using the provided information in the following paper chromatogram : JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Basics of Organic Chemistry Question 176 English Fig : Paper chromatography for compounds A and B. the calculated Rf value of A ‾\underline{\hspace{2cm}}​×\times× 10-1.
Numerical answer
View written solutionFree

Correct answer: 4

  1. In paper chromatography, the retention factor is defined as

Rf=distance travelled by the solutedistance travelled by the solvent frontR_f = \frac{\text{distance travelled by the solute}}{\text{distance travelled by the solvent front}}Rf​=distance travelled by the solvent frontdistance travelled by the solute​

  1. From the given chromatogram, compound AAA has travelled 2 cm2\,\text{cm}2cm, while the solvent front has travelled 5 cm5\,\text{cm}5cm.

  2. Therefore,

Rf(A)=25=0.4R_f(A)=\frac{2}{5}=0.4Rf​(A)=52​=0.4

  1. The question asks for the value in the form:

‾×10−1\underline{\hspace{2cm}} \times 10^{-1}​×10−1

Now,

0.4=4×10−10.4 = 4 \times 10^{-1}0.4=4×10−1

  1. Hence, the required integer is

4\boxed{4}4​

PreviousNext

More from Basics of Organic Chemistry

  • The correct order of acid character of the following compounds is : Includes diagram2021 · MCQ
  • Which one among the following resonating structures is not correct?2021 · MCQ
  • Which among the following is the strongest acid ?2021 · MCQ
  • The correct decreasing order of densities of the following compounds is : Includes diagram2021 · MCQ
  • The number of stereoisomers possible for 1, 2-dimethyl cyclopropane is :2021 · MCQ
  • Which one of the following compounds is not aromatic?2021 · MCQ
  • Given below are two statements : Statement I : A mixture of chloroform and aniline can be separated by simple distillation. Statement II : When separating aniline from a mixture of aniline and water by steam distillation aniline boils…2021 · MCQ
  • The compound/s which will show significant intermolecular H-bonding is/are : Includes diagram2021 · MCQ