1.

Sodium bismuthate isA. a powerful reducing-agentB. used in the estimation of `Mn^(2+)` ionsC. a non-toichiometric compoundD. obtaine3d by treating `Bi_2O_3 "with conc. "NaOH`

Answer» Correct Answer - B
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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