Question

an iron nail is dipped in the solution of copper sulphate for about so minutes, state change in colour observed. give reason for change. ​

Answer 1

Explanation:

iron nail become brown due to the deposition of displaced copper over solution of test tube changes from Blue to light green because iron displaces copper from its solution and green coloured ferrous sulphate is formed

Answer 2

Answer:

the colour of copper sulphate solution =blue colour

colour of iron nail=grey

when iron nail is dipped in copper sulphate solution then the copper solution will turn into iron sulphate solution which is green in colour

and the brown colour copper will stick to the iron nail.

this all happened because of displacement reaction as iron is more reactive than copper