A yellow substance changed into brown when placed in sunlight
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When lead nitrate is heated it gives yellow coloured lead oxide along with the brown coloured fumes of nitrogen dioxide.
Reaction : 2Pb(NO3)2 ------> 2PbO + 4NO2 + O2
X = Pb(NO3)2
Reaction : 2Pb(NO3)2 ------> 2PbO + 4NO2 + O2
X = Pb(NO3)2
mridulapunjabi2003:
this reaction takes place in presence of heat not sunlight
Sorry , I don't read question carefully.
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