MCQ
Which of the following is solid at room temperature?
- A$\text{CO}$
- B$ \mathrm{CO}_2 $
- ✓$ \mathrm{SiO}_2 $
- D$\mathrm{OF}_2 $
✓
Answer
Correct option: C.
$ \mathrm{SiO}_2 $
Silicon dioxide involves covalent $\text{Si−O}$ bonds. It has strong van der waal's forces of interactions and thus exists as solids.
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