A) Boiling of \[{{H}_{2}}O\]
B) Melting of\[KCN\]
C) Boiling of\[C{{F}_{4}}\]
D) Melting of\[Si{{O}_{2}}\]
Correct Answer: D
Solution :
During the melting of \[Si{{O}_{2}},\] the breaking of covalent bond takes place.
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