Question

The basic character of oxides
$MgO,SrO,K_{2}O,NiO,C{s}_{2}O$ increase in the
order:

• A. $MgO>SrO>K_{2}O>NiO>C{s}_{2}O$
• B. $C{s}_{2}O<K_{2}O<MgO<SrO<NiO$
• C. $NiO<MgO<SrO<K_{2}O<C{s}_{2}O$
• D. $K_{2}O<NiO<MgO<SrO<C{s}_{2}O$

Answer 1

The correct option is C $NiO<MgO<SrO<K_{2}O<C{s}_{2}O$

The oxides of alkali metals are more basic than alkaline earth metals. On moving down the group of alkali metals or alkaline earth metals, the basic character increases. Hence, the increasing order of basic character is $NiO<MgO<SrO<K_{2}O<C{s}_{2}O$.