Question

The compound insoluble in acetic acid is

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

Answer 1

Answer: (C)

calcium oxalate

Answer 2

$CaC_2 0_4$ is insoluble in acetic acid. This distinguishes $Ca^{2+}$ from $Ba^{2+}$ ion.