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4 months ago

Department of Theatre, Dance, and Motion Pictures Class 12th

36. Which of the following reactions are disproportionation reactions?

i. Cu+→ Cu2++ Cu

ii. 3MnO4− + 4H+→2MnO4− + MnO2 + 2H2O

iii. 2KMnO4→K2MnO4 + MnO2 + O2

iii. 2MnO4− + 3Mn2+ + 2H2O → 5MnO2 + 4H+

(A) i,ii

(B) i,ii,iii

(C) ii,iii,iv

(D) i,iv
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Payal Gupta

Contributor-Level 10

36.  (A)i, ii

Disproportionation/redox reaction is a reaction in which one compound is oxidised as well as reduced at the same time.

(A) Cu+  ?  Cu2+  +  Cu 

  ( + 1)       ( + 2)        (0) 

(B) 3MnO4- +  4H+  ?  2MnO4- +  MnO2 +  2H2O 

  ( + 6)                          ( + 7)           ( + 4) 

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