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(D) $NaNO_2$ (Sodium nitrite) acts as both an oxidising and a reducing agent because the $N$ atom is in the $+3$ oxidation state,which is an intermedi

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$NaNO_2$

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(D) $NaNO_2$ (Sodium nitrite) acts as both an oxidising and a reducing agent because the $N$ atom is in the $+3$ oxidation state,which is an intermediate oxidation state between its minimum $(-3)$ and maximum $(+5)$ values.Oxidising property:$2NaNO_2 + 2KI + 2H_2SO_4 \xrightarrow{} Na_2SO_4 + K_2SO_4 + 2NO + 2H_2O + I_2$Reducing property:$H_2O_2 + NaNO_2 \xrightarrow{} NaNO_3 + H_2O$

Which of the following substances acts as an oxidising as well as a reducing agent?

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