1. Tardigrade
  2. Question
  3. Chemistry
  4. Which of the following arrangements represent increasing oxidation number of the central atom?

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

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

Redox Reactions

Solution:

Given elements are:

$CrO _{2}^{-}, CrO _{4}^{2-}, ClO _{3}^{-}$ and $MnO _{4}^{-}$

Let the oxidation number of central atom be '$x$'.

Oxidation number of $O =- 2$.

$CrO_{2}^{-}: x +2 \times(-2)=-1$

$x - 4 =- 1$ or $x = + 3$

$CrO _{4}^{2-}: x +4 \times(-2)=-2$

$x-8=-2$ or $x=+6$

$ClO _{3}^{-}: x +3 \times(-2)=-1$

$x-6=-1$ or $x=+5$

$MnO _{4}^{-}: x +4 \times(-2)=-1$

$x -8=-1$ or $x =+ 7$

increasing order of oxidation number of the central atom is:

$CrO _{2}^{-}< ClO _{3}^{-}< CrO _{4}^{2-}< MnO _{4}^{-}$