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Elements of Group 13, 14 and 15 — Chemistry STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 ScienceChemistryElements of Group 13, 14 and 152 Marks
Question
Give reason: Ammonia has higher melting and boiling points.
✓

Answer

In solid and liquid state, $NH_3$ molecules get associated together through hydrogen bonding.
As a result, extra amount of energy is required to break such intermolecular hydrogen bonds. Hence, ammonia has higher melting and boiling points.

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