1.

N_2H_2 reduces IO_3^(-) //H^+ ......

Answer»

to `I^(+)`
with `I_2` as an intermediate by violet colour in `"CCL"_4` LAYER
to `I^(-)`
indicated by blue colour with starch

Solution :`3N_(2)H_(4)+2IO_(3)^(-) rarr 3N_(2)+2I^(THETA)+6H_(2)O`


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