The correct order of increasing bond angles in the following species is

Options

A. `CIO_(2)^(-) lt Cl_2 O lt CIO_2`
B. `Cl_2 O lt CIO_2 lt CIO_(2)^(-)`
C. ` CIO_2 lt Cl_2 O lt CIO_(2)^(-)`
D. `Cl_2 O lt CIO_(2)^(-) lt CIO_(2)`

Answer

A

Explanation

In `CIO_2 , Cl` is `sp^2` -hybridized and the bond angle is `118^@`. In `Cl_2 O,O` is `sp^3`-hybridized. However due to repulsions between two big sized Cl atoms, the bond angle increases from `109^@ -28’ `to `111^@`. In `CIO_(2)^(-)` Cl atom is also `sp^3`-hybridized but due to ip-bp repulsions, the angle decreases from `109^@ -28`. to `103^@`. Thus, the increasing order of bond angle is : ` CIO_(2)^(-) lt Cl_2 O lt CIO_2`