JEE Main Chemistry question

The nitrate which, when heated, gives off a gas (or mixture of gases) that cannot relight a glowing splinter is:

(A)Sodium nitrate
(B)Ammonium nitrateCorrect
(C)Lead nitrate
(D)Potassium nitrate

Answer: (B)

Solution

Alkali metal nitrates (, ) decompose to the nitrite plus , and lead nitrate decomposes to the oxide plus and — both releasing free , which readily relights a glowing splinter. Ammonium

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Question ID VK-146298