An important insecticide is obtained by the action of chloral on chlorobenzene. It is

Options

A. BHC
B. Gammexene
C. DDT
D. Lindane

Answer

To solve the question regarding the insecticide obtained by the action of chloral on chlorobenzene, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The question states that chloral (CCl3CHO) reacts with chlorobenzene (C6H5Cl).

2. **Understand the Reaction**: The reaction involves chloral acting on chlorobenzene in the presence of a dehydrating agent, typically sulfuric acid (H2SO4). This reaction leads to the formation of an insecticide.

3. **Write the Reaction**: The reaction can be represented as:
\[ \text{CCl}_3\text{CHO} + \text{C}_6\text{H}_5\text{Cl} \xrightarrow{\text{H}_2\text{SO}_4} \text{Dichlorodiphenyltrichloroethane (DDT)} \]

4. **Formation of DDT**: The product formed from this reaction is known as Dichlorodiphenyltrichloroethane (DDT), which has the chemical formula C14H9Cl5.

5. **Properties and Uses of DDT**: DDT is a colorless, tasteless, and odorless chemical compound that is widely used as an insecticide. It was first prepared in 1874 and became popular for agricultural use and in controlling insect-borne diseases.

6. **Conclusion**: Therefore, the important insecticide obtained from the reaction of chloral on chlorobenzene is DDT (Dichlorodiphenyltrichloroethane).

### Final Answer:
The important insecticide obtained by the action of chloral on chlorobenzene is **Dichlorodiphenyltrichloroethane (DDT)**.

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