Iron nails were dipped in a solution kept in a test tube. After half an hour, it was observed that the colour of the solution has changed. The solution present in the test tube before the reaction was that of _________.
A
aluminium sulphate
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
zinc sulphate
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
iron sulphate
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
copper sulphate
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
The correct option is D copper sulphate ∙ Iron is more reactive than copper but less reactive than zinc and aluminium.
∙ Hence, it will displace copper from copper sulphate solution and not zinc and aluminium from their respective solution.
∙ The reaction will occur as follows: Copper Sulphate(Blue)+Iron→Iron Sulphate(Green)+Copper
So, the solution present in the test tube was copper sulphate.