MDCAT Chemistry MCQ #398

A student compares the boiling points of Propanal (49°C) and Propan-1-ol (97°C). What is the primary reason for this significant difference?

MDCAT Chemistry MCQ #398

  1. Question 1

    Q1. A student compares the boiling points of Propanal (49°C) and Propan-1-ol (97°C). What is the primary reason for this significant difference?

    • A) Propanal has stronger intermolecular hydrogen bonding than Propan-1-ol
    • B) Propanal lacks intermolecular hydrogen bonding while Propan-1-ol has it
    • C) Propanal is non-polar while Propan-1-ol is a polar molecule
    • D) Propanal has a higher molecular mass than Propan-1-ol

    Answer: Propanal lacks intermolecular hydrogen bonding while Propan-1-ol has it

    Explanation: Propanal (aldehyde) has a lower boiling point than Propan-1-ol (alcohol) due to lack of H-bonding. Option A is incorrect as alcohols bond more strongly.