Question

Which of the following is an ionic compound?

• A. $S{O}_3$
• B. $ICl$
• C. $KI$
• D. $CHC{l}_3$

Answer 1

The correct option is C $KI$

$S{O}_2$: Sulphur and oxygen are both non-metals and therefore, $S{O}_2$ is a covalent compound.

$ICl$: Iodine and chlorine are both non-metals and therefore, $ICl$ is a covalent compound.

$KI$: Potassium is a metal and iodine is a non-metal. Therefore, $KI$ is an ionic compound (due to the electronegativity difference between the metal and the non-metal).

$CHC{l}_3$: Carbon, hydrogen and chlorine all are non-metals and therefore $CHC{l}_3$ is covalent.