Question

In glyceraldehydes, the complete sequence of priority is _________

(a) –OH > -CH2OH > -CHO > -H

(b) –H > -CH2OH > -CHO > -OH

(c) –H > –OH > -CH2OH > -CHO

(d) –OH > CHO > -CH2OH > -H

This question was posed to me in final exam.

My question is taken from E and Z Nomenclature of Geometric Isomers topic in chapter Structure and Stereostructure of Molecules of Engineering Chemistry I

Answer 1

Correct choice is (d) –OH > CHO > -CH2OH > -H

Best explanation: In glyceraldehydes, the complete sequence of priority is  –OH > CHO > -CH2OH > -H.