Reaction of $B r_{2}$ with $N a_{2} C O_{3}$ in aqueous solution gives sodium bromide and sodium bromate with evolution of $C O_{2}$ gas. The number of sodium bromide molecules involved in the balanced chemical equation is:

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Solution

The correct option is A 5
Reaction of $B r_{2}$ with $N a_{2} C O_{3}$ in aqueous solution gives sodium bromide and sodium bromate with evolution of $C O_{2}$ gas. The number of sodium bromide molecules involved in the balanced chemical equation is 5.

$3 N a_{2} C O_{3} + 3 B r_{2} \to 5 N a B r + N a B r O_{3} + 3 C O_{2}$

Hence, the correct option is $A .$

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