Which of the following anion(s) is/are interfering radicals?

B O_{3}^{3 -}

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F^{⊖}

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P O_{4}^{3 -}

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none of these

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Solution

The correct options are
A $B O_{3}^{3 -}$
B $F^{⊖}$
D $P O_{4}^{3 -}$
Interfering radicals are oxalate, tartrate, fluoride, borate and phosphate and they are anionic radicals.

These form complexes with $I I I^{r d}$ gr group reagent ammonium chloride and ammonium hydroxide. This leads to incomplete precipitation of $I I I^{r d}$ group cations and causes immature precipitation of $I V^{t h}$ and $V^{t h}$ group cations in alkaline medium.

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