question_answer

Which of the following molecules, has the largest bond angle around the central atom?

A)  \[{{H}_{2}}O\]                 

B)  \[S{{O}_{2}}\]                  

C)  \[{{H}_{2}}S\]  

D)         \[{{H}_{2}}Se\]

Correct Answer: A

Solution :

\[{{H}_{2}}O\] has the largest bond angle among VIA group hydrides. The reason is the high electronegativity of oxygen atom due to which bonding electron pair remains closer to oxygen atom in \[{{H}_{2}}O\] molecule. Hence, the repulsion between bonding \[{{e}^{-}}\] is maximum in \[{{H}_{2}}O\] due to which the bond-angle is maximum (104.5°) in \[{{H}_{2}}O\].