Sweta took a white coloured substance in a test tube and heated it. He observes brown fumes coming out of it. When he put burning incense stick in the test tube it burns with flame. Write chemical reaction for the experiment.
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Answer:
2Pb(NO3)2 → 2PbO + 4NO2 + O2
Explanation:
The given white salt is lead nitrate Pb(NO3)2
It decomposes to give brown fumes(NO2) and due to the oxygen gas (O2), burning incense stick in the test tube, burns with flame. It also leaves a yellow residue (PbO) behind. The reaction can be given as follows:
2Pb(NO3)2 → 2PbO + 4NO2 + O2