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Which of the following reactions are dis...

Which of the following reactions are disproportionation reactions?
`(A)" " Cu^(+)rarrCu^(2+)+Cu`
`(B)" "3 MnO_(4)^(2-)+4H^(+)rarr2MnO_(4)^(-)+MnO_(2)+2H_(2)O`
`(C )" "2KMnO_(4)rarrK_(2)MnO_(4)+MnO_(2)+O_(2)`
`(D)" "2MnO_(4)^(-)+3Mn^(2+)+2H_(2)O rarr5MnO_(2)+4H^(+)`

A

a,b

B

a,b,c

C

b,c,d

D

a,d

Text Solution

Verified by Experts

The correct Answer is:
A
both oxidation and reduction takes place by same element is called disproportionate reaction
`Cu^(+1)rarrCu^(+2)+Cu`
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Which of the following reactions are disproportionation reactions? (A)" " Cu^(+)rarrCu^(2+)+Cu (B)" "3 MnO_(4)+4H^(+)rarr2MnO_(4)^(-)+MnO_(2)+2H_(2)O (C )" "2KMnO_(4)rarrK_(2)MnO_(4)+MnO_(2)+O_(2) (D)" "2MnO_(4)^(-)+3Mn^(2+)+2H_(2)O rarr5MnO_(2)+4H^(+)

Which of the following reactions are disproportionation reactions ? (i) Cu^(+) to Cu^(2+) + Cu (ii) 3MnO_4^(2-) + 4H^(+ ) to 2MnO_4^(-) + MnO_2 + 2H_2O (iii) 2KMnO_4 to K_2 MnO_4 + MnO_2 + O_2 (iv) 2MnO_4^(-) + 3Mn^(2+) + 2H_2O to 5MnO_2 + 4H^+

K_(2)MnO_(4)+H^(+) to KMnO_(4)+MnO_(2)darr

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