MCQ
Which substance has the highest melting point?
- A$CO$
- B$CO_2$
- C$SiO_2$
- D$P_2O_5$
✓
Answer
$(c) \,CO, CO_2$ and $P_2O_5$ are covalent compounds having their molecular lattice. But $SiO_2$ is a covalent compound having $3-$ dimensional network structure and it has covalent lattice, so $M.P.$ of $SiO_2$ is maximum.
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