$R - O | | C - N H_{2} + x N a O H + B r_{2} ⟶ R - N H_{2} + 2 N a B r + N a_{2} C O_{3} + H_{2} O$
Number of moles of $N a O H$ used in above Hoffmann bromamide reaction is:

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Solution

The correct option is B 4
As refer to IMAGE $01$ , this is Hoffmann Bromamide degradation reaction.
Mechanism is shown in IMAGE $02$ .

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