Question

The compound insoluble in acetic acid is

• A. calcium oxide
• B. calcium carbonate
• C. calcium oxalate
• D. calcium hydroxide

Answer 1

Answer: (C)

$Ca{C}_2{O}_4$ is insoluble in acetic acid. This distinguishes $C{a}^{2+}$ from $B{a}^{2+}$ ion.