Samples of four metals A, B, C, and D were taken and added to the following solution one by one.
The results obtained have been tabulated as follows.
| Metal | Iron (II) sulphate | Copper (II) sulphate | Zinc sulphate | Silver nitrate |
|---|
| A | No reaction | Displacement | | |
| B | Displacement | | No reaction | |
| C | No reaction | No reaction | No reaction | Displacement |
| C | No reaction | No reaction | No reaction | No reaction |
Use the table above to answer the following questions about metals A
(i) B is the most reactive metal because it gives a displacement reaction with iron (II) sulphate.
(ii) When metal B is added to copper (II) sulphate solution, a displacement reaction will take place due to which the blue colour of copper (II) sulphate solution will fade and a red-brown deposit of copper will be formed on metal B.
(iii) Metal B is the most reactive because it displaces iron from its salt solution. Metal A is less reactive because it displaces copper from its salt solution. Metal C is still less reactive because it can displace only silver from its salt solution and metal D is the least reactive because it cannot displace any metal from its salt solution. Hence, the decreasing order of reactivity of the metals is B > A > C > D.
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