1.

Which of the following reactions are disproportionation reactions? (a) Cu^(+) rarr Cu^(2+) + Cu (b) MnO_(4)^(2-) + 4H^(+) rarr 2MnO_(4)^(-) + MnO_(2) + 2H_(2)O (c ) 2KMnO_(4) rarr K_(2)MnO_(4) + MnO_(2) + O_(2) (d) 2MnO_(4)^(-) + 3Mn^(2+) + 2H_(2)O rarr 5MnO_(2) + 4H^(+)

Answer»

a,b
a,b,C
b,c,d
a,d

Solution :`{:(Cu^(+), rarr, Cu^(2+) ,+, Cu),((+1),,(+2),,(0)):}`
`{:(MnO_(4)^(2-),+,4H^(+),rarr,2MnO_(4)^(-),+,MnO_(2),+,2H_(2)O),((+6),,,,(+7),,(+4),,):}`


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