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Electrovalent compounds have ..............

Electrovalent compounds have .................. (high/low) melting points.

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[i] Incovalent compounds, the bond is formed due to __ [sharing/ transfer] of electrons. [ii] Electrovalent compounds have a__ [low/ high] boiling point. [iii] A milecule of __ contains a triple bond. [hydrogen, ammonia, nitrogen].

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Covalent compounds have low m.p. because :

Explain the following: Covalent compounds usually have low melting and boiling points.