Class 11

9. Redox reactions question bank (Chemistry)

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Q1.

Which one of the following is not a redox reaction:

(A)
CaCO₃ → CaO + CO₂
(B)
2H₂ + O₂ → 2H₂O
(C)
Na + H₂O → NaOH + ½H₂
(D)
MnCl₃ → MnCl₂ + ½Cl₂
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Q2.

The oxidation state of iodine in H₄IO₆⁻ is:

(A)
+7
(B)
−1
(C)
+5
(D)
+1
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