The common name for the molecule give below is
`CH_2=CH-CH_2-Cl`

Options

A. Vinyl chloride
B. Aryl chloride
C. Allyl chloride
D. None of these

Answer

To determine the common name for the molecule `CH₂=CH-CH₂-Cl`, we will follow these steps:

### Step 1: Identify the Structure
The given molecule is `CH₂=CH-CH₂-Cl`. This indicates that there is a carbon-carbon double bond (C=C) between the first and second carbon atoms, and a chlorine atom (Cl) is attached to the third carbon atom.

### Step 2: Analyze the Functional Groups
In this structure:
- The first carbon (C1) has two hydrogen atoms (H).
- The second carbon (C2) has one hydrogen atom and is part of the double bond.
- The third carbon (C3) is attached to the chlorine atom and has two hydrogen atoms.

### Step 3: Determine the Type of Compound
The presence of a carbon-carbon double bond and a chlorine atom indicates that this compound is an alkyl halide. Specifically, since the double bond is between the first and second carbon atoms and the chlorine is on the third carbon, we can classify this compound further.

### Step 4: Identify the Common Name
The common name for this compound is "allyl chloride." This is because the structure contains an allyl group (which is characterized by the presence of a C=C bond adjacent to a carbon that is bonded to a halogen).

### Final Answer
The common name for the molecule `CH₂=CH-CH₂-Cl` is **allyl chloride**.

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