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Question

2Pb(NO3)2(s)Heat2PbO(s)+4NO2(g)+O2(g)

The reaction given above is an example of a/an:

A
decomposition reaction
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B
exothermic reaction
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C
endothermic reaction
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D
combination reaction
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Solution

The correct options are
A decomposition reaction
C endothermic reaction
In the given reaction, lead nitrate is decomposing to form lead oxide, nitrogen dioxide, and oxygen on absorption of heat. This is a thermal decomposition reaction since a single reactant is breaking down into multiple products on absorption of heat.

However, this reaction is also an endothermic reaction since heat energy is getting absorbed.

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