Which of the following disproportionation reaction 

Options

A. `F_2+H_(2) O rarr HOF +HF`
B. `2HCHO +NaOH rarr HCOONa + CH_3 OH`
C. `P_(4(s)) +3NaOH +3H_(2)O rarr PH_(3)+3NaH_(2)PO_2`
D. `2NO_(2)+2KOH rarr KNO_(2)+KNO_(3)+HH_(2)O`

Answer

B, C, D

Explanation

`overset(0)(F_2)+H_2overset(-2)OrarrHoverset(0)Ooverset(-1)F+Hoverset(-1)F`
`2Hoverset(0)CHO+NaOHrarrHoverset(+2)COONa+overset(+2)CH_3OH`
`overset(0)P_(4(s))+3NaOH+3H_(2)O rarroverset(-3)PH_3+3NaH_2overset(+1)PO_2`
`2overset(+4)NO_2+2KOH rarrKoverset(+3)NO_2+Koverset(+5)NO_3 +H_2O`