First slide

Chemical properties

Question

HBr / HI are prepared by heating

Easy

A

Bromide / iodide respectively with dil. $H_{2} {SO}_{4}$
B

Bromide / iodide respectively with conc. ${HPO}_{3}$
C

Bromide / iodide respectively with conc. $H_{3} {PO}_{4}$
D

Bromide / iodide respectively with dil. ${HPO}_{3}$

Solution

$\begin{array}{l} 2 MBr + H_{2} S O_{4} \overset{Δ}{\to} M_{2} {SO}_{4} + 2 HBr \\ 2 MI + H_{2} S O_{4} \overset{Δ}{\to} M_{2} {SO}_{4} + 2 HI \\ M = Na, K \end{array}$

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