Four test tubes were taken and marked A, B, C and D respectively. 2 mL of solution of `Al_(2)(SO)_(3)` in water was filled in each of the four test-tubes. Clean piece of metal zinc was placed in test tube A, clean iron nail was put in test tube B, clean copper wire was placed in test tube C and a clean aluminium wire was placed in test tube D. What colour change would you observe in all the four tubes ?

Explanation

No colour change would take place in any of the four tubes. The solution would remain colourless. Actually th metal aluminium is placed above all the three metals in the activity series. Therefore, no displacement reaction can be possible.