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Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations1 Mark
MCQ
A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
  • ✓
    $KMnO _4$ is an oxidising agent, it oxidises $FeSO _4$
  • B
    $FeSO _4$ acts as an oxidising agent and oxidises $KMnO _4$
  • C
    The colour disappears due to dilution, no reaction is involved
  • D
    $KMnO _4$ is an unstable compound and decomposes in presence of $FeSO _4$ to a colourless compound.
✓

Answer

Correct option: A.
$KMnO _4$ is an oxidising agent, it oxidises $FeSO _4$
 Potassium permanganate $(KMnO_4)$ acts as good oxidizing agent in acidic medium and reduces itself to manganese captions, $Mn^{2+}$. It oxidizes $FeSO_4 to Fe_2(SO_4)_3​​​​​​​$​​​​​​​

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