Vinegar reaction with ammonia

Common acidic ingredients include vinegar, lemon juice, sour milk, buttermilk, yogurt, tart fruits, and cream of tartar. Commercial bakeries often use ammonium bicarbonate or ammonium carbonate as a leavening agent. The gas-producing reaction with ammonium bicarbonate actually generates both carbon dioxide gas and ammonia gas ... 

Mixing bleach with some other household chemicals can be hazardous due to unwanted side reactions. Adding acid (even vinegar) to bleach generates chlorine gas, as mentioned above, whereas mixing bleach with ammonia solutions (even urine ) can produce chloroamines, which are toxic. So remember, if you put bleach down your toilet, flush it before you pee ... 

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