A small piece of aluminium metal was placed in a beaker containing a greenish solution. After some time, a grey coating was observed on the aluminium piece. The greenish solution is most likely to be :(1) salt solution of copper metal(2) salt solution of iron metal (3) salt solution of zinc metal(4) salt solution of aluminium metal

A small piece of aluminium metal was placed in a beaker containing a g

1.	A small piece of aluminium metal was placed in a beaker containing a greenish solution. After some time, a grey coating was observed on the aluminium piece. The greenish solution is most likely to be :(1) salt solution of copper metal(2) salt solution of iron metal (3) salt solution of zinc metal(4) salt solution of aluminium metal
Answer» A small piece of aluminium metal was placed in a beaker containing a greenish solution. After some time, a grey coating was observed on the aluminium piece. The greenish solution is most likely to be : (1) salt solution of copper metal (2) salt solution of iron metal (3) salt solution of zinc metal (4) salt solution of aluminium metal