Question 9Which of the following equation depicts reducing nature of H 2 O 2b I - 2- H - 2 O - 2-2 OH -rightarrow 2 I -2 H - 2 O - O - 2 1c Mn -2- H - 2 O - 2 rightarrow Mn -4-2 OH -11PbS-4H2O2-rightarrow PbSO4-4H2Ol

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Byju's Answer

Standard XII

Chemistry

Hydrogen Peroxide

Question 9Whi...

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Question 9

Which of the following equation depicts reducing nature of $H_{2} O_{2}$

$(a) 2 [F e (C N)_{6}]^{4 -} + 2 H^{+} + H_{2} O_{2} \to 2 [F e (C N)_{6}]^{3 -}] + 2 H_{2} O (b) I_{2} + H_{2} O_{2} + 2 O H^{-} \to 2 I^{-} + 2 H_{2} O + O_{2} (c) M n^{2 +} + H_{2} O_{2} \to M n^{4 +} + 2 O H^{-} P b S + 4 H_{2} O_{2} \to P b S O_{4} + 4 H_{2} O$

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Solution

(b)

$H_{2} O_{2}$ acts as an oxidising as well as reducing in alkaline media. The given below reaction show the reducing action in basic medium

$I_{2} + H_{2} O_{2} + 2 O H^{-} \to 2 I^{-} + 2 H_{2} O + O_{2} 2 M n O_{4}^{-} + 3 H_{2} O_{2} \to 2 M n O_{2} + 3 O_{2} + 2 H_{2} O + 2 O H^{-}$

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Question 8

Which of the following equation depict the oxidising nature of $H_{2} O_{2}$ ?

$(a) 2 M n O_{4}^{-} + 6 H^{+} 5 H_{2} O_{2} \to 2 M n^{2 +} + 8 H_{2} O + 5 O_{2} (b) 2 F e^{3 +} + 2 H^{+} H_{2} O_{2} \to 2 F e^{2 +} + 2 H_{2} O + O_{2} (c) 2 l^{-} + 2 H^{+} + H_{2} O_{2} \to I_{2} + 2 H_{2} O (d) K I O_{4} + H_{2} O_{2} \to K I O_{3} + H_{2} O + O_{2}$