Question

Arrange the following oxides in the increasing order of basic character.
$MgO,SrO,K_{2}O,NiO,C{s}_{2}O$

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

Answer 1

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

As the size of the metal increases, basic nature of metal oxides also increases. The size of metals in the increasing order is given below:

$Ni<Mg<Sr<K<Cs$
So, the increasing order of basic character is as follows:

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