Question

Which species among the following has bond angle of ${109.5}^o$?

• A. $S{O}_2$
• B. $BeC{l}_2$
• C. $B{F}_3$
• D. $C{H}_4$

Answer 1

The correct option is D $C{H}_4$

$S{O}_2$ has 2 bond pairs and 1 lone pair so steric number is 3 and hydrisisation is $s{p}^2$. Hence it has trigonal planar geometry and bond angle is around ${120}^0$.

$BeC{l}_2$ has 2 bond pairs and 0 lone pair so steric number is 2 and hydrisisation is $sp$. Hence it has linear geometry and bond angle is ${180}^0$.


$B{F}_3$ has 3 bond pairs and 0 lone pair so steric number is 3 and hydrisisation is $s{p}^2$. Hence it has trigonal planar geometry and bond angle is ${120}^0$.

$C{H}_4$ has 4 bond pairs and 0 lone pair so steric number is 4 and hydrisisation is $s{p}^3$. Hence it has tetrahedral geometry and bond angle is ${109.5}^o$.
Hence, option d is the correct answer.