20.A metal nitrate ‘A’ on heating gives yellowish brown coloured metal oxide along with brown gas ‘B’ and a colorless gas ‘C’. Aqueous solution of “A’ on reaction with potassium iodide forms a yellow precipitate of compound ‘D’ identify. ‘A’, ‘B’, ‘C’ , ‘D’. Also identify the types of both the reactions. Metal present in ‘A’ is used in alloy which is used for soldering purpose.
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1. A is Lead Nitrate or Pb(NO3)2, B is Nitrogen Dioxideor NO2, C is Oxygen or O2 and D is Lead Nitrate or Pb(NO3)2.
2. Reaction 1--->
2Pb(NO3)2(s) --- (Heating)---> 2PbO(s) + 4NO2(g) + O2(g)
Reaction 2---->
Pb(NO3)2(aq) + 2KI(aq)-----> PbI2(s)+2KNO3(aq)
3. Metal Present in A is Lead.
2. Reaction 1--->
2Pb(NO3)2(s) --- (Heating)---> 2PbO(s) + 4NO2(g) + O2(g)
Reaction 2---->
Pb(NO3)2(aq) + 2KI(aq)-----> PbI2(s)+2KNO3(aq)
3. Metal Present in A is Lead.
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