Question

Bond angles in $H_{2}O$ and $BeC{l}_2$ respectively are:

• A. ${109.5}^o,{180}^o$
• B. ${104.5}^o,{180}^o$
• C. ${180}^o,{109.5}^o$
• D. ${109.5}^o,{109.5}^o$

Answer 1

The correct option is B ${104.5}^o,{180}^o$

$H_{2}O$ is $s{p}^3$ hybridised. So, its expected bond angle should be ${109.5}^o$. But due to lone pair - lone pair repulsion, actual bond angle comes out to be ${104.5}^o$.
$BeC{l}_2$ has $sp$ hybridisation and hence has bond angle equals to ${180}^o$.