Q. 224.1( 13 Votes )

A student added f

Answer :

Test tube A:



Iron sulphate is a green coloured solution. However, the resultant aluminium sulphate is colourless.


Test tube B:



Copper sulphate is a blue coloured solution. However, the resultant aluminium sulphate is colourless.


Test tube C:



No reaction takes place here because aluminium is more reactive than iron.


Test tube D:



Here, iron replaces copper and form ferrous sulphate which is a pale green coloured solution because iron is more reactive than copper.


Colour changes were observed in test tubes A, B and D.


Therefore, reactivity in decreasing order is: Al > Fe > Cu


Aluminium is the most reactive metal because it displaced both iron and copper from their compounds.


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