Which of the following arrangements represent increasing oxidation number of the central atom? (i) CrO2 – , ClO3 – , CrO4 2– , MnO4 – (ii) ClO3 – , CrO42– , MnO4 – , CrO2 (iii) CrO2 – , ClO3 – , MnO4 – , CrO4 2– (iv) CrO4 2– , MnO4 – , CrO2 – , ClO3–

This is a Multiple Choice Questions as classified in NCERT Exemplar Option (i) is the correct answer Let the oxidation number of central atom be 'y'. Oxidation number of O = −2 CrO2−: y + 2 * (−2) = −1 y − 4 = −1 or y = +3 CrO42−? : y + 4 * (−2) = −2 y − 8 = −2 or y = +6 ClO3−: y + 3 * (−2) = −1 y − 6 = −1 or y = +5 MnO4−: y + 4 * (−2) = −1 y − 8 = −1 or y = +7 increasing order of oxidation number of the central atom is: CrO2 – , ClO3 –, CrO4 2–, MnO4

Which of the following arrangements represent increasing oxidation number of the central atom?

(i) CrO₂ ^–, ClO₃^– , CrO₄^2– , MnO₄^–

(ii) ClO₃^– , CrO₄^2–, MnO₄ ^– , CrO₂

(iii) CrO₂^–, ClO₃^– , MnO₄ ^– , CrO₄ ^2–

(iv) CrO₄ ^2– , MnO₄^– , CrO₂^–, ClO₃^–

3 Views|Posted 9 months ago

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Alok Kumar Singh | Contributor-Level 10

9 months ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Option (i) is the correct answer

Let the oxidation number of central atom be 'y'.

Oxidation number of O = −2

CrO₂⁻: y + 2 * (−2) = −1

y − 4 = −1 or y = +3

CrO₄²⁻? : y + 4 * (−2) = −2

y − 8 = −2 or y = +6

ClO₃⁻: y + 3 * (−2) = −1

y − 6 = −1 o

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Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight 2025

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