Q. Reaction of ${Br}_{2}$ with ${Na}_{2}{CO}_{3}$ in 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) 1
B) 3
C) 5
D) 7
Explanation

(c)
${Br}_{2}$ is disproportionated in basic medium as
$3{Br}_{2} + 3{Na}_{2}{CO}_{3} \longrightarrow 5NaBr + {NaBrO}_{3} + 3{CO}_{2}\ \ \ \ \ \ \ \ \$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.