Common alum is

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p-Block Elements - I

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Common alum is

A

${K_2}S{O_4}.A{l_2}{(S{O_4})_3}.24{H_2}O$

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

${(N{H_4})_2}S{O_4}.FeS{O_4}.6{H_2}O$

Solution

Potassium alum is the common alum of commerce whose chemical formula is

$K _2 SO _4 \cdot Al _2\left( SO _4\right)_3 \cdot 24 H _2 O$

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 $K _2 SO _4 \cdot Cr _2\left( SO _4\right)_3 \cdot 24 H _2 O$

Standard 11

Chemistry

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