Question

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

• A. $N{{a}_{2}}O$
• B. $N{{a}_{2}}{{O}_{2}}$
• C. $NaN{{O}_{3}}$
• D. $NaN{{O}_{2}}$

Answer 1

Answer: (D)

$NaN{{O}_{2}}$

Answer 2

$NaN{{O}_{2}}$ (sodium nitrite) act both as oxidising as well as reducing agent because in it N-atom is in $+3$ oxidation state (intermediate oxidation state). Oxidising property: $2NaNO_2 + 2KI + 2H_2SO_4 \to Na_2SO_4$ $+ K_2SO_4 + 2NO + 2H_2O + I_2$ Reducing property : $H_2O_2 + NaNO_2 \to NaNO_3 + H_2O$