Question

According to cahn-Ingold-prelog sequence rules, the correct order of priority of the given groups is

• A. -COOH > - CH₂OH > -OH > -CHO
• B. -COOH > -CHO > - CH₂OH > -OH
• C. -OH > - CH₂OH > -CHO > -COOH
• D. -OH > -COOH >-CHO > - CH₂OH

Answer 1

The correct option is D

-OH > -COOH >-CHO > - CH₂OH

When the atom (which is directly attached to the asymmetric carbon atom) of a group has higher
atomic number, the group gets higher priority. Groups with atoms of comparable atomic number
having double or triple bond, have high priority than those have single bond.

$-OH>-COOH>-CHO>-C{H}_{2}OH$