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Introduction to E2 Mechanism

To an aqueous...

Question

To an aqueous solution of $A g N o_{3}$ some NaOH (aq) is added, till a brown ppt. is obtained. To this $H_{2} O_{2}$ is added dropwise. The ppt. turns black with the evolution of $O_{2}$ . The black ppt. is

Ag₂O

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Ag₂O₂

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AgOH

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None of these

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Solution

The correct option is A
Ag₂O

$A g N O_{3}$ + NaOH ---> AgOH + $N a N O_{3}$

2AgOH ---> $A g_{2} O$ + $H_{2} O$

(Black ppt.)

$A g_{2} O$ + $H_{2} O_{2}$ ---> $2 A g + H_{2} O + O_{2}$

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