Which of the following is a covalent network solid?
- A. Ice
- B. Sodium chloride
- C. Solid carbon dioxide
- D. Diamond
Explanation
In diamond every carbon is covalently bonded to four others in a continuous three dimensional network, so melting it means breaking covalent bonds and the melting point is above 3500 degrees Celsius. Ice and dry ice are molecular solids held by hydrogen bonds and dispersion forces respectively, and sodium chloride is ionic. Silicon dioxide and silicon carbide are the other standard network examples.
Related questions
Ionic crystals such as sodium chloride are hard and have high melting points because
Molecular crystals such as solid iodine have low melting points because
Metals are malleable and ductile because
Which of the following solids is held together by dispersion forces only?
Solid sodium chloride does not conduct electricity, but molten sodium chloride does, because