Question

A mixture of 3 samples namely; p-nitrophenol (A), p-amino phenol (B) and p-nitro anisole (C) were eluted onto TLC plate coated with alumina Al2O3 as a polar surface applying ethylacetate as a non polar eluent. What will be spot color and substance matching according to the attached TLC drawing? solvent front NOZ TLC Plate O A-Blue, B-Red and C-Green O A-Red, B-Blue and C-Green O A-Green, B-Blue and C-Red O A-Red, B-Green and C-Blue O A-Green, B-Red and C-Blue

Answer 1

Most polar compound have less Rf.

Here; in the given molecules -OH and -NH2 are polar functional groups and the corresponding compound will have most polarity; and in result it will show less Rf value.

Compound C is least polar and it show greater Rf value.

A mixture of 3 samples namely: p-nitrophenol (A), p-amino phenol (B) and p-nitro anisole (C) were eluted onto TLC plate coated with alumina Al2O3 as a polar surface applying ethylacetate as a non polar eluent. What will be spot color and substance matching according to the attached TLC drawing? solvent front NH NO TLC Plate O A-Blue, B-Red and C-Green O A-Red, B-Blue and C-Green 1 A-Green, B-Blue and C-Red O A-Red, B-Green and C-Blue A-Green, B-Red and C-Blue