Which of the following reactions is/are auto redox or induced oxidation reaction(s)?

P b + O_{2} + H_{2} O ⟶ P b O + H_{2} O_{2}

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{N a}_{2} S O_{3} + {N a}_{3} A s O_{3} + O_{2} ⟶ {N a}_{2} S O_{4} + {N a}_{3} A s O_{4}

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R C H = C H R + O_{2} + 2 H_{2} O ⟶ 2 R C H = O + 2 H_{2} O_{2}

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P_{4} + ⊖ O H ⟶ P H_{3} + H_{2} P O_{2}^{⊖}

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Solution

The correct options are
A $P b + O_{2} + H_{2} O ⟶ P b O + H_{2} O_{2}$
B ${N a}_{2} S O_{3} + {N a}_{3} A s O_{3} + O_{2} ⟶ {N a}_{2} S O_{4} + {N a}_{3} A s O_{4}$
C $R C H = C H R + O_{2} + 2 H_{2} O ⟶ 2 R C H = O + 2 H_{2} O_{2}$
D $P_{4} + ⊖ O H ⟶ P H_{3} + H_{2} P O_{2}^{⊖}$
Auto or induced redox reaction is a form of redox reaction in which some of a reactant is oxidised and some of the same reactant is reduced.
A), (B), and (C) are auto or induced redox reaction.
Option D is disproportionation reaction.
Hence options A,B,C & D are correct.

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