163
Question
In which one of the following case breaking of covalent bond takes place?
In which one of the following case breaking of covalent bond takes place?
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Solution
The correct option is D Melting
of SiO2
During melting of SiO2, the giant network structure held by covalent bonds breaks to give individual molecules of SiO2. In contrast, during boiling of H2O only change of state occurs from liquid to gaseous; during melting of KCN, electrostatic attraction between K+ and CN- ions is overcome; during boiling of CF4, van der Waal's forces of attraction breaks.
Melting of SiO2
During melting of SiO2, the giant network structure held by covalent bonds breaks to give individual molecules of SiO2. In contrast, during boiling of H2O only change of state occurs from liquid to gaseous; during melting of KCN, electrostatic attraction between K+ and CN- ions is overcome; during boiling of CF4, van der Waal's forces of attraction breaks.
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