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[ Question Bank ] - 2022 — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10Science[ Question Bank ] - 20222 Marks
Question
Write scientific reason.
Adding zinc particles to a solution of copper sulphate makes the blue solution colorless.
✓

Answer

1. Zinc is more reactive than copper.
2. Therefore, zinc displaces copper from copper sulphate solution.
$
\underset{\substack{\text { Copper } \\ \text { sulphate }}}{ CuSO _{4( aq )}}+\underset{\text { Zinc }}{ Zn _{( s )}} \longrightarrow \underset{\substack{\text { Zinc } \\ \text { sulphate }}}{ ZnSO _{4( aq )}}+\underset{\text { Copper }}{ Cu _{( s )}}
$
3. The blue colour of copper sulphate solution fades due to the formation of colourless zinc sulphate. Hence, adding zinc particles to a solution of copper sulphate makes the blue solution colorless.

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