Alum is the name used for all double salts having the composition `M_(2)^(-) SO_(4).M_(2)^(III)(SO_(4))_(3).24H_(2)O`. Where `M^(III)` stands for `AI^(+3), Cr^(+3), Fe^(+3)`, while `M^(I)` stands forA. `Li^(+), Cu^(+), Ag^(+)`B. `Li^(+), NH_(4)^(+), Na^(+)`C. `Na^(+), K^(+), Rb^(+)`D. `Ca^(+2), Mg^(+2), Sr^(+2)`

Alum is the name used for all double salts having the composition `M_(

1.	Alum is the name used for all double salts having the composition `M_(2)^(-) SO_(4).M_(2)^(III)(SO_(4))_(3).24H_(2)O`. Where `M^(III)` stands for `AI^(+3), Cr^(+3), Fe^(+3)`, while `M^(I)` stands forA. `Li^(+), Cu^(+), Ag^(+)`B. `Li^(+), NH_(4)^(+), Na^(+)`C. `Na^(+), K^(+), Rb^(+)`D. `Ca^(+2), Mg^(+2), Sr^(+2)`
Answer» Correct Answer - C `M^(-)`-Monovalent cation except `Li^(+)` due to small size.

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