When H2O2 Is Added To An Acidified K2Cr2O7 Solution

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4. When H2O2 is added to an acidified K2Cr2O7 solution

Q. When H2​O2​ is added to an acidified K2​Cr2​O7​ solution 3314 269 KEAMKEAM 2018Hydrogen Report Error A

A green colour solution is obtained

0% B

A yellow solution is obtained

18% C

A blue-violet solution is obtained

36% D

A green precipitate is formed

18% E

A yellow precipitate is formed

18%

Solution:

On adding H2​O2​ in acidic solution of K2​Cr2​O7​, H2​O2​ oxidisc it to CrO5​ (chromic penta oxidc/ chromic per oxide) and gives the blue-violet solution. K2​Cr2​O7​+H2​SO4​+4H2​O2​⟶K2​SO4​+2CrO5​<br/><br/>+5H2​O CrO5​ on decomposition gives oxygen 4CrO5​+6H2​SO4​⟶Cr2​(SO4​)3​+6H2​O+7O2​