Multiple choice

Which of the following matches is correct?

  1. Dipole moment: CO2<NH3<NF3<H2O

  2. Bond strength: N2<O2<I2<H2

  3. Ionic character: CaF2<CaCl2<CaBr2<CaI2

  4. Boiling point: PH3<AsH3<NH3<SbH3

  5. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Unlike expected order of boiling point, i.e., NH3<PH3<AsH3 <SbH3, the actual order of boiling points is PH3<AsH3<NH3<SbH3.  Boiling point of NH3 is exceptionally high due to the presence of H-bonding.

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