Which of the Following is an Anion

Question

Which of the following is an anion?
A) NaCl
B) KCl
C) H2SO4
D) HCO3-

Accepted Answer

An anion is a negatively charged ion, and HCO3- is a negatively charged ion formed by the dissociation of an acid. NaCl and KCl are both salts consisting of cations and anions, while H2SO4 is an acid consisting of hydrogen ions and anions.