MCQ
Common alum is
- ✓${K_2}S{O_4}.A{l_2}{(S{O_4})_3}.24{H_2}O$
- B${K_2}S{O_4}.C{r_2}{(S{O_4})_3}.24{H_2}O$
- C${K_2}S{O_4}.F{e_2}{(S{O_4})_3}.24{H_2}O$
- D${(N{H_4})_2}S{O_4}.FeS{O_4}.6{H_2}O$
$K _2 SO _4 \cdot Al _2\left( SO _4\right)_3 \cdot 24 H _2 O$
Ammonium alum is $\left( NH _4\right) SO _4 \cdot Al _2\left( SO _4\right)_3 \cdot 24 H _2 O$.
Chrome alum is $K _2 SO _4 \cdot Cr _2\left( SO _4\right)_3 \cdot 24 H _2 O$
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$A.$ $I _2( g ) \rightarrow 2 I ( g )$
$B.$ $HCl ( g ) \rightarrow H ( g )+ Cl ( g )$
$C.$ $H _2 O ( l ) \rightarrow H _2 O ( g )$
$D.$ $C ( s )+ O _2( g ) \rightarrow CO _2( g )$
$E.$ Dissolution of ammonium chloride in water