In Which One Of The Following Cases, Breaking Of Covalent Bond Takes Place?

Why Kaysons ?

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Question

In which one of the following cases, breaking of covalent bond takes place?

Solution

Correct option is

During melting of SiO2 the giant network structure held by covalent bonds breaks to give individual molecules of  In contrast, during boiling of  only change of state occurs from liquid to gaseous; during melting of KCN, electrostatic attraction between  ions is overcome; during boiling of  van der Walls’ forces of attraction breaks.

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