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)
Correct answer is A
Ammonium trioxocarbonate (IV) is an unstable compound. It decomposes on heating to yield ammonia, carbon (IV) oxide and water. All of these are gases.