Pblock Elementsii Result Question 36
36. Reaction of $\mathrm{Br} _2$ with $\mathrm{Na} _2 \mathrm{CO} _3$ in aqueous solution gives sodium bromide and sodium bromate with evolution of $\mathrm{CO} _2$ gas. The number of sodium bromide molecules involved in the balanced chemical equation is
(2011)
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Answer:
Correct Answer: 36. $( 5 )$
Solution:
$\mathrm{Br} _2$ is disproportionated in basic medium as
$3 \mathrm{Br} _2+3 \mathrm{Na} _2 \mathrm{CO} _3 \longrightarrow 5 \mathrm{NaBr}+\mathrm{NaBrO} _3+3 \mathrm{CO} _2$
BETA
