On heating lead (II) nitrate gives a brown gas “A”. The gas “A” on cooling changes to colourless solid “B”. Solid “B” on heating with NO changes to a blue solid ‘C’. Identify ‘A’, ‘B’ and ‘C’ and write reactions involved and draw the structures of ‘B’ and ‘C’.
On heating lead (II) nitrate gives a brown gas “A”. The gas “A” on cooling changes to colourless solid “B”. Solid “B” on heating with NO changes to a blue solid ‘C’. Identify ‘A’, ‘B’ and ‘C’ and write reactions involved and draw the structures of ‘B’ and ‘C’.
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1 Answer
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This is a long answer type question as classified in NCERT Exemplar
Here, ‘A’ is NO2 (Nitrogen dioxide)
‘B’ is N2O4 (dinitrogen tetraoxide)
‘C’ is N2O3 (dinitrogen trioxide)
A brown gas is produced when lead nitrate (II) is heated
2Pb (NO3)2
2PbO + 4NO2 + O22NO2
N2O42NO + N2O4
2N2O3
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