The boiling points of the Group 15 binary hydrides increase smoothly from NH₃ to SbH₃.

Name: The boiling points of the Group 15 binary hydrides increase smoothly from NH 3 to SbH 3 .
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The boiling points of Group 15 binary hydrides (NH₃, PH₃, AsH₃, SbH₃, BiH₃) do not increase smoothly from NH₃ to SbH₃. Instead, NH₃ has a higher boiling point than expected due to hydrogen bonding, while the others follow a more regular trend based on molecular mass and van der Waals forces.

The Boiling Points of the Group 15 Binary Hydrides Increase