Question

What do you observe when a boiling test tube containing lead nitrate powder is heated it over a flame?​

Answer 1

Answer: In this thermal decomposition reaction occurs

Explanation:

The color of lead nitrate before heating is white, and the color of lead nitrate after heating is yellow due to the coloring of lead oxide fumes, red-brown due to nitrogen dioxide.

The decomposition of lead nitrate (Pb(NO3)2) takes place under heat. so it is an example of a thermal decomposition reaction.

Then lead oxide (PbO), nitrous oxide (N2) and oxygen (O) are formed.

the balanced reaction is given below:-

2Pb(NO3)2 (s) Δ→ 2PbO(s) + 4NO2(g)+ O2 (g)

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