COMEDK202510 May 2025Evening ShiftChemistryAldehydes and KetonesActual
Choose the incorrect statement.
Options
- AAcetone undergoes Wolff Kishner reaction to yield Propane.
- BThe increasing order of boiling points of 5 compounds having comparable molar masses is as follows: Methoxyeth
- CThe order of reactivity towards Nucleophilic attack is Methanal > Ethanal > Benzaldehyde > Acetophenone
- DDuring nucleophilic addition of HCN to RCHO , the hybridisation changes from sp ^2 to sp ^3 and a tetrahedral
Correct answer
B. The increasing order of boiling points of 5 compounds having comparable molar masses is as follows: Methoxyeth
Step-by-step solution
Statement (2) is incorrect because ketones have higher boiling points than isomeric aldehydes due to greater dipole-dipole interactions from two electron-donating alkyl groups. Propanone (b.p. 56°C ) boils higher than Propanal (b.p. 49°C ). The correct increasing order of boiling points should be: Methoxyethane The given order in statement (2) places Propanone before Propanal, which is incorrect.