Question

An example of covalent compound is :

• A. $Ca{Cl}_2$
• B. $BaO$
• C. $KCl$
• D. $CH{Cl}_3$

Answer 1

Answer: (D)

$CaC{l}_2$ and BaO are a binary ionic compound, KCl is ionic compound is made of a metal element and a nonmetal element. While $CHC{l}_3$ carbon does 4 covalent bonds with those four atoms, one covalent bond with each, each of the four bonds is a sharing of 2 electrons, for a total of 8 electrons . Carbon starts with 4 valence shell electrons, each covalent bond brings in 1 more electron into each bond for a total of 8 electrons in carbon's valence shell (rule of 8).

Thus Option D is correct.