Question

Quartz, $Si{O}_2$, which is insoluble in most of the solvent with a high melting point. Which type of force best describe the physical properties of quartz?

• A. Hydrogen bonding
• B. Covalent bonding
• C. Ionic bonding
• D. $P$ bonding
• E. Dispersion forces

Answer 1

Answer: (A), (B)

The correct options are
A Covalent bonding
B Hydrogen bonding

Option $\left(A\right)$ and $\left(B\right)$ are correct.

The physical properties of quartz are due to covalent bonding and hydrogen bonding.

Each silicon atom is covalently bonded to four oxygen atoms. Each oxygen atom is covalently bonded to two silicon atoms.Thus all atoms in the entire crystal are linked together by covalent bonding which makes quartz hard, brittle, and have high melting points.

When quartz molecules are built up to form crystals and silicates, several linked $Si{O}_4$ units with attached hydrogen by hydrogen bonding.