Select the incorrect statement(s) :

Options

A. KOH is weaker base than NaOH
B. `Mg^(2+)` ions are precipitated with theh addition of `NH_4OH` in the presence of `NH_4 Cl`
C. `CaO_2` is less stable than ` MgO_2`
D. Milk of magnesia is an aquesous solution of `Mg (OH)_2`

Answer

A, B, C

Explanation

A) Down the group Ksp of hydrolysis of IIA group elements increases. So KOH is more basic NaOH
B) `Mg^(+2)` ions are not precipitated as `Kip lt Ksp`
C) Peroxides are more soluble than super oxides