On heating lead nitrate the product formed is :
Choose the correct answer :
(a) The nitrate salt which does not give a mixture of NO2 and O2 on heating is :
(i) AgNO3, (ii) KNO3,
(iii) Cu(NO3)3, (iv) Zn(NO3)2.
(b) The chemical used in the brown ring test is :
(i) CuSO4, (ii) FeSO4
(iii) Fe2(SO4)3 (iv) ZnSO4.
(c) Lead nitrate decomposes on heating to give :
(i) NO, (ii) N2O,
(iii) NO2 (iv) N2O5.