State whether the following statements are true or false:

When zinc is introduced to an iron sulphate solution, the colour of the iron sulphate solution changes.

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True

False

answer is A.

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Detailed Solution

The given statement is true.
Concept- The displacement reaction occurs when an atom or a group of atoms is displaced by another atom in a molecule. As zinc is a more electropositive element than ferrous, it is more reactive in nature.
When we add zinc to a ferrous sulphate solution, the colour of the solution changes because the zinc displaces the ferrous sulphate solution and generates zinc sulphate solution. When zinc sulphate displaces ferrous sulphate from its solution, a grey-coloured ferrous precipitate forms, followed by a colourless zinc sulphate solution.
The above explanation can be illustrated in the following reaction: