MCQ
Which one will liberate $B{r_2}$ from $KBr$
- A${I_2}$
- B$S{O_2}$
- C$HI$
- ✓$C{l_2}$

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$CaS{O_4}.5{H_2}{O_{(s)}}\, \rightleftharpoons \,CaS{O_4}.3{H_2}{O_{(s)}} + 2{H_2}{O_{(g)}}$ is equal to