1.

limiting compositions of f - block hydrides are

Answer»

`(H_(2)O+O_(2)) and H_(2)O`
`(H_(2)O+O_(2)) and (H_(2)O+OH^(-))`
`H_(2)O and (H_(2)O +O_(2))`
`H_(2)O and (H_(2)O+OH^(-))`

Solution :`[Fe(CN)_(6)]^(4-)+(1)/(2)H_(2)O_(2)+H^(+)RARR[Fe(CN)_(6)]^(3-)+H_(2)O`
`[Fe(CN)_(6)]^(3-)+(1)/(2)H_(2)O_(2)+OH^(-)rarr[Fe(CN)_(6)]^(4-)+H_(2)O+(1)/(2)O_(2)`


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