The dipole moments of `CH_(3)Cl , CH_(2)Cl_(2), CHCl_(3)` are in the order

Options

A. `CH_(2) Cl_(2) gt CHCl _(3) gt CH_(3) Cl`
B. `CH_(3) Cl gt CH_(2) Cl_(2) gt CHCl _(3)`
C. `CH_(2) Cl _(2) gt CH_(3) Cl gt CHCl _(3)`
D. `CH_(3) Cl gt CHCl _(3) gt CH_(2) Cl_(2)`

Explanation

To determine the order of dipole moments for the compounds CH₃Cl, CH₂Cl₂, and CHCl₃, we need to analyze the molecular structures and the contributions of each bond to the overall dipole moment.

### Step 1: Draw the Lewis Structures
- **CH₃Cl (Methyl Chloride)**: The structure consists of one carbon atom (C) bonded to three hydrogen atoms (H) and one chlorine atom (Cl). The dipole moment is directed from the C-H bonds towards the Cl atom.

- **CH₂Cl₂ (Methylene Dichloride)**: The structure consists of one carbon atom bonded to two hydrogen atoms and two chlorine atoms. The dipole moments from the C-Cl bonds will partially cancel out the dipole moments from the C-H bonds.

- **CHCl₃ (Chloroform)**: The structure consists of one carbon atom bonded to one hydrogen atom and three chlorine atoms. The dipole moment is directed towards the Cl atoms, and since there are three Cl bonds, the dipole moment is significant.

### Step 2: Analyze the Dipole Moments
- **CH₃Cl**: The dipole moment is primarily due to the C-Cl bond, with some contribution from the C-H bonds. The overall dipole moment is relatively strong because there is only one Cl atom pulling the electron density.

- **CH₂Cl₂**: The presence of two Cl atoms means that the dipole moments from the C-Cl bonds will partially cancel each other out. However, the contribution from the C-H bonds still adds to the overall dipole moment, making it stronger than CHCl₃ but weaker than CH₃Cl.

- **CHCl₃**: With three Cl atoms, the dipole moments from the C-Cl bonds are significant and directed towards the Cl atoms. However, the presence of only one C-H bond means that the overall dipole moment is less than that of CH₃Cl and CH₂Cl₂.

### Step 3: Order the Dipole Moments
Based on the analysis:
- **CH₃Cl** has the highest dipole moment.
- **CH₂Cl₂** has a moderate dipole moment.
- **CHCl₃** has the lowest dipole moment.

Thus, the order of dipole moments is:
**CH₃Cl > CH₂Cl₂ > CHCl₃**