1which of the following substance,when mixed undergo a chemical equation?
A Iron and calcium nitrate solution
BCopper and water
CLead and Steam
DZinc and Lead(II) nitrate solution
2.X,Y,Z are metals.At high tempreature,carbon will remove oxygen from the oxides of Z and Y but not from that of X,Z displace Y from solution of the nitrate of Y.Which following represents the ascending order of reativity of three element?