MDCAT Chemistry MCQ #5375

The boiling point of Ammonia (-33.4 C) is significantly higher than that of Phosphine (-87.7 C). This contrast is explained by:

MDCAT Chemistry MCQ #5375

  1. Question 1

    Q1. The boiling point of Ammonia (-33.4 C) is significantly higher than that of Phosphine (-87.7 C). This contrast is explained by:

    • A) Nitrogen is more electronegative than Phosphorus, allowing hydrogen bonding
    • B) Phosphine has a higher molecular mass than Ammonia
    • C) Ammonia has a lower dipole moment than Phosphine
    • D) Phosphorus atoms are smaller than Nitrogen atoms

    Answer: Nitrogen is more electronegative than Phosphorus, allowing hydrogen bonding

    Explanation: Ammonia has a higher boiling point than Phosphine because Nitrogen is highly electronegative, allowing for strong intermolecular hydrogen bonding.