Insoluble dissolves in concentrated when

CHEMISTRY · Single correct · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions

Problem

Insoluble

\text{As}_2\text{S}_3

dissolves in concentrated

\text{HNO}_3

when (a)

\text{As}^{3+}

and

\text{S}^{2-}

are both oxidised and

\text{HNO}_3

is reduced (b)

\text{As}^{3+}

is oxidised and

\text{HNO}_3

is reduced (c)

\text{S}^{2-}

is oxidised and

\text{HNO}_3

is reduced (d)

\text{HNO}_3

is oxidised and

\text{S}^{2-}

is reduced