1.

Sodium bismuthate is

Answer»

a POWERFUL reducing-agent
used in the estimation of `Mn^(2+)` ions
a non-toichiometric compound
obtaine3d by treating `Bi_2O_3 "with conc. "NaOH`

Solution :Oxidation of `Mn^(2+)` ions is CARRIED out quantitively to `MnO_(4)^(-)` by warming with sodium bismuthate in excess of `HNO_(3)`
`2MN^(2+)+5NaBiO_(3)+14H^(+) to 2MnO_(4)^(-)+5Na^(-)+5Bi^(3+)+7H_(2)O`
(a). It is a strong oxidizing agent as shown in (b)
(c) It is a stoichiometric compound
(d). `BiO_(3)+6NaOH to 2Na_(3)Bi_3+3H_(2)O`


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