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Choose the disproportionation reaction a...

Choose the disproportionation reaction among the following redox reactions.

A

`3Mg(s) +N_2(g)rarrMg_3N_2(s)`

B

`P_4(s)+3NaOH(aq) +3H_2O(l)rarrPH_3(g)+3NaH_2PO_2(aq)`

C

`Cl_2(g)+2KI(aq)rarr2KCl(aq) +I_2(s)`

D

`Cr_2O_3(s) +2Al(s) rarr Al_2O_3(s)+2Cr(s)`

Text Solution

Verified by Experts

The correct Answer is:
B
`overset(0)P_4+3NaOH+3H_2Orarroverset(-3)(PH_3)+3NaH_2overset(+1)(PO_2)`
In this reaction , P is oxidised to `NaH_2PO_2` and reduced to `PH_3` . This is disproportionation
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