Question

Which mixed sulphate is not an alum?

Accepted Answer

${\rm{CuS}}{{\rm{O}}_4} \cdot {\rm{A}}{{\rm{l}}_2}{\left( {{\rm{S}}{{\rm{O}}_4}} \right)_3} \cdot 24{{\rm{H}}_2}{\rm{O}}$

Answer

${{\rm{K}}_2}{\rm{S}}{{\rm{O}}_4} \cdot {\rm{A}}{{\rm{l}}_2}{\left( {{\rm{S}}{{\rm{O}}_4}} \right)_3} \cdot 24{{\rm{H}}_2}{\rm{O}}$

Answer

${{\rm{K}}_2}{\rm{S}}{{\rm{O}}_4} \cdot {\rm{C}}{{\rm{r}}_2}{\left( {{\rm{S}}{{\rm{O}}_4}} \right)_3} \cdot 24{{\rm{H}}_2}{\rm{O}}$

Answer

${\rm{N}}{{\rm{a}}_2}{\rm{S}}{{\rm{O}}_4} \cdot {\rm{F}}{{\rm{e}}_2}{\left( {{\rm{S}}{{\rm{O}}_4}} \right)_3} \cdot 24{{\rm{H}}_2}{\rm{O}}$

JEE CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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