Identify the decomposition reaction.


2NH 3 + H 2SO 4 ⟶ (NH 4) 2SO 4

3Pb + 2H 3PO 4 ⟶ 3H 2 + Pb 3(PO 4) 2

2 NO 2 ⟶ 2 O 2 + N 2

2NaBr + Ca(OH) 2 ⟶ CaBr 2 + 2NaOH