WAEC - Chemistry (2012 - No. 29)
On heating, the following trioxocarbonate (IV) salts decompose to give solid residue except
ammonium trioxocarbonate (IV)
calcium trioxocarbonate (IV)
lead (ll) trioxocarbonate(IV)
zinc trioxocarbonate (IV)
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Ammonium trioxocarbonate (IV) is an unstable compound. It decomposes on heating to yield ammonia, carbon (IV) oxide and water. All of these are gases.