metal 'A' is greyish white in colour and lustrous metal.'A' is heating in an air , forms 'B' magnetic oxide black colour , identify 'A' and 'B' write the chemical reaction
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Elements 'X' is iron. Iron fillings burn vigorously when sprinkled on the flame. These react with sulphur to form ferrous sulphide which is a black colored compound.
Fe+S→FeS
Iron reacts with dil HCl to form ferrous chloride and hydrogen gas.
Fe+2HCl→FeCl
2
+H
2
Iron reacts with steam to form Fe
3
O
4
and hydrogen gas
3Fe+4H
2
O→Fe
3
O
4
+4H
2
So X is iron, Y is FeS and Z is Fe
3
O
4
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