@Nishant-Thakre Column chromatography is a method used to separate a single compound from a mixture of compounds.
→ Here we take a mixture of 3 compounds (A) benzanilide (B) aniline (C) acetophenone.
→ To separate the mixture here we are using a mixture of two solvents. hexane and ethyl acetate in the ratio 20:80
→ hexane is a non-polar solvent having 20% composition.
→ ethyl acetate is a polar solvent having 80% composition.
→ Means nonpolar compound present in a less quality as compared to polar solvent.
→ Hence more polar compound present in a mixture will separate out first with the polar solvent hence.
→ Acetophenone is more polar among (A) & (B) hence it will separate first and after that.
→ Aniline is more polar than benzanilide hence A will elute out after that.
→ Hence the answer should be (C), (A) & (B)
how did you compare their polarity give reason
@Nishant-Thakre You will have to check the dipole moments to compare their polarities
this question was asked in mains we were not supposed to remember the data of dipole moment of every compound
there must be some logic
@Nishant-Thakre I agree ..it isn't possible to remember the Dipole moment values for each compound ..but you can compare them on a relative basis ..
More charge distribution leads to more charge seperation.Higher amount of partial charges
In first one CO dipole is very high, because NH and CO will be in resonance and hence electron displaced is very less. So first is greater than 2nd.