Bond angles in `Cl_2 O` and `ClO_2`, are 

Options

A. `118^@ , 120^@`
B. `109^@ 28^(1) , 111^@`
C. `111^@, 118^@`
D. `115^@, 120^@`

Answer

To determine the bond angles in \( Cl_2O \) and \( ClO_2 \), we need to analyze the molecular structures of both compounds.

### Step 1: Draw the Lewis Structure of \( Cl_2O \)
- In \( Cl_2O \), there are two chlorine (Cl) atoms and one oxygen (O) atom.
- The oxygen atom is the central atom and forms single bonds with each chlorine atom.
- Oxygen has two lone pairs of electrons.

### Step 2: Determine the Bond Angle in \( Cl_2O \)
- The presence of lone pairs on the oxygen atom affects the bond angle.
- The bond angle in \( Cl_2O \) is approximately \( 109.5^\circ \) (or \( 109^\circ 28' \)), which is characteristic of a bent molecular geometry due to the repulsion between the lone pairs.

### Step 3: Draw the Lewis Structure of \( ClO_2 \)
- In \( ClO_2 \), there is one chlorine atom and two oxygen atoms.
- The chlorine atom is the central atom and forms a double bond with one oxygen and a single bond with the other oxygen.
- The chlorine atom has one lone pair of electrons.

### Step 4: Determine the Bond Angle in \( ClO_2 \)
- The bond angle in \( ClO_2 \) is affected by the double bond and the lone pair on chlorine.
- The bond angle in \( ClO_2 \) is approximately \( 111^\circ \).

### Final Answer
- The bond angle in \( Cl_2O \) is \( 109^\circ 28' \) and in \( ClO_2 \) is \( 111^\circ \).