The sBlock Elements - Result Question 26
####27. Which of the following oxides is most acidic in nature?
(a) $MgO$
(b) $BeO$
(c) $CaO$
(d) $BaO$
[2018]
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Solution:
- (b) In metals, moving down the group, metallic character increases, so basic nature increases hence most acidic will be $BeO$.
$\xrightarrow[\text{ increasing basic character }]{BeO<MgO<CaO<BaO}$ (a) $BeH_2<CaH_2<BaH_2$ Smaller the size of cation, more will be its polarising power. Hence, $BeH_2$ will be least ionic.
