Question

Which is the colour of solution for mandap in a piece of zinc in dilute sulphuric acid?

Answer 1

It should be colourless if both the metal and the acid are pure. If the zinc contains traces of transition metals that produce coloured ions then the colour of the sulphate of the impurity metal manifests itself, eg iron which would produce a green (Fe2+) or yellow to brown (Fe3+) solution.

Answer 2

● The solution formed on dipping a piece of zinc in dilute sulphuric acid is Colourless.