Question

uminium sulphate and copper sulphate solutions were taken in two test tubes I and II respectively. A few pieces of iron filings were then added to both the solutions. The four students A, B, C and D recorded their observations in the form of a table as given below​

Answer 1

Answer:

B

Explanation:

Aluminium lies above iron in the metal reactivity series. Since, aluminium is more reactive than iron, iron will fail to displace it from its solution. Thus, no reaction will take place and the solution will remain unchanged.

Copper lies below iron in the metal reactivity series. Since iron is more reactive than copper, iron will succeed to displace copper from its solution. Now, copper sulphate solution is blue in colour and ferrous sulphate green. So, iron displaces copper from blue coloured copper sulphate solution to form green coloured ferrous sulphate solution.

Fe + CuSO₄ ---------------> FeSO₄ + Cu