1.

Which mixed sulpate is not an alum ?

Answer»

`K_2SO_4. Al_2(SO_4)_3. 24H_2O`
`K_2SO_4 .Cr_2(SO_4)_3. 24H_2O`
`Na_2SO_4. Fe_2(SO_4)_3. 24H_2O`
`CuSO_4Al_2(SO_4)_3. 24H_2O`

ANSWER :D


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