Question

when a small amount of lead nitrate taken in a dry test tube and heated gently over a flame, what changes would occur?​

Answer 1

Answer!!

Given that lead nitrate, having chemical formula Pb(NO3)2 is heated in a test tube. The two observations of this chemical reaction are: (i) When lead nitrate is heated, it decomposes into lead oxide (PbO), nitrogen dioxide (NO2), and oxygen gas (O2). The type of this reaction is thermal decomposition reaction.

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Answer 2

when a small amount of lead nitrate is taken in a dry test tube and heated gently over a flame, the following changes will occur:

(i) Upon heating lead nitrate strongly, it decomposes with a crackling sound and a precipitate of lead oxide is formed along with the release of oxygen and nitrogen dioxide gas.

(ii) When lead nitrate is heated, it decomposes into lead oxide (PbO), nitrogen dioxide (NO2), and oxygen gas (O2).

(iii) When lead nitrate is heated, it due to thermal decomposition gives out metal oxide, oxygen, and nitrogen dioxide. Lead gives out a yellow buff-colored residue lead oxide with a reddish-brown gas nitrogen dioxide.