JAMB - Chemistry (2024 - No. 57)
A gas that turns lime water milky is likely to be from
Trioxocarbonate(IV)
Chloride
Trioxonitrate(V)
Tetraoxosulphate(VI)
Explicação
When carbon dioxide gas passes through lime water (Ca(OH)\(_2\)), it reacts to form calcium carbonate (CaCO\(_3\)), which is a milky substance.CO\(_2\) is obtained from Trioxocarbonates(IV). Thus, calcium carbonate is a trioxocarbonate(IV).