Verified Solution • 2025–26 Session
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QJEEM21Ch4748: JEE Main 2021 Chemistry - Class 11 JEEM21Ch4748 Solution: Given below are two statements : Statement I : Retardation…
Given below are two statements :
Statement I : Retardation factor (Rf) can be measured in meter/centimeter.
Statement II : Rf value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below :
Statement I : Retardation factor (Rf) can be measured in meter/centimeter.
Statement II : Rf value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below :
Multiple Choice Options
- A Statement I is true but statement II is false
- B Statement I is false but statement II is true
- C Both statement I and statement II are true
- D Both statement I and statement II are false
Step-by-Step Verified Solution
Retardation factor (Rf) is the ratio of the distance moved by the substance from the baseline to the distance moved by the solvent from the baseline. So, it is dimensionless. The distance moved by the substance is due to the adsorption of the substance on the stationary phase. It does not depend on the nature of the solvent. But the distance moved by the solvent will change with the nature of the solvent. Therefore, Rf will vary with the change in the solvent.
So, both the statements are false.
So, both the statements are false.