1) The reaction of $Br_{2}$ with$Na_{2}CO_{3}$ in an aqueous solution gives sodium bromide and sodium bromate with evolution of$CO_{2}$ gas. The number of sodium bromide molecules involved in the balanced chemical equation is A) 4 B) 6 C) 5 D) 8 Answer: Option CExplanation:Br2 is disproportionated in basic medium as $2Br_{2}+3Na_{2}CO_{3} \rightarrow 5NaBr+NaBrO_{2}+3CO_{2}$
