Question

Which of the following compounds are incorrectly named?

(1) FeCl3 - iron (III) chloride
(2) HgCl2 - mercurous chloride
(3) SnS2 - tin (IV) sulfide
(4) KClO2 - potassium chloroxide
a) 1 and 2
b) 2 and 4
c) 3 and 4
d) 1 and 4

Answer 1

The incorrectly named compounds are HgCl2 - mercurous chloride and KClO2 - potassium chloride, which should be named mercury(II) chloride and potassium chlorite, respectively. Option b.

Step-by-step explanation:

In the provided list of compounds, FeCl3 is correctly named iron (III) chloride, since the iron ion has a 3+ charge and there are three chloride ions in the formula. HgCl2 should be named mercury(II) chloride, not mercurous chloride, making option (2) incorrectly named. SnS2 is correctly named tin (IV) sulfide, as tin has a 4+ charge, and there are two sulfide ions in the formula. KClO2 should be named potassium chlorite, not potassium chloride, making option (4) incorrectly named. Therefore, the incorrectly named compounds are (2) HgCl2 - mercurous chloride and (4) KClO2 - potassium chloride. Option b.