1.

An element 'x' is dropped in blue colour solution 'y'. Element 'x' get reddish colour on it's surface tje solution 'y' turns to green colour. Guess 'x' and 'y' chemical?

Answer»

X - IRON
Y - Copper Sulphate
Fe + CuSO4(aq) ----> FESO4 + Cu
FeSO4 colour is light green
CuSO4 is blue
and after REACTION copper gets DEPOSITED on remaining iron and form reddish coating..
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