Which of the following is/are the correct observations when 2 g of lead nitrate powder is heated over a flame in a boiling tube? a. Brown fumes of NO2 are observed b. Oxygen is evolved c. PbO2 is produced d. Yellow precipitate is obtained
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a) Brown coloured fumes of NO2 gas are evolved , residue left is solid white lead oxide
(b) It is a thermal decomposition reaction.
2Pb(NO3)2−→−Heat2PbO+4NO2↑⏐⏐(Brown fumes)+O2↑⏐⏐
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