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Need clarity, kindly explain! - Redox Reaction and Electrochemistry - JEE Main-4

The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is

  • Option 1)

    +4

  • Option 2)

    +6

  • Option 3)

    +2

  • Option 4)

    +3

 
Answers (1)
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As we learned

 

Oxidation number and oxidation state -

A term that is often used interchangeably with the oxidation number is the oxidation state. This implies oxidation number denote the oxidation state of an element.

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 Reaction between KI and K2Cr2O7 :

K_{2}Cr_{2}O_{7}+6KI+7H_{2}SO_{4}\rightarrow 4K_{2}SO_{4}+Cr_{2}\left ( SO_{4} \right )_{3}+7H_{2}O+3I_{2}

Cr has +3 oxidation state in Cr2(SO4)3.

 


Option 1)

+4

Option 2)

+6

Option 3)

+2

Option 4)

+3

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