Give one example each of the following :
A molecule containing double bond.

Answer

To answer the question "Give one example of a molecule containing a double bond," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Concept of a Molecule**:
- A molecule is a chemical substance that consists of two or more atoms bonded together by chemical bonds. These atoms can be of the same element or different elements.

2. **Identifying Double Bonds**:
- A double bond is a type of covalent bond formed when two pairs of electrons are shared between two atoms. This means that four electrons are involved in the bond.

3. **Finding an Example**:
- One of the simplest and most common examples of a molecule containing a double bond is the oxygen molecule (O₂). In O₂, two oxygen atoms are bonded together by a double bond.

4. **Explaining the Structure of O₂**:
- Each oxygen atom has six valence electrons. To achieve a stable configuration (octet), they share two pairs of electrons, resulting in a double bond. This sharing allows each oxygen atom to effectively have eight electrons in its outer shell.

5. **Conclusion**:
- Therefore, the example of a molecule containing a double bond is oxygen (O₂).

### Final Answer:
An example of a molecule containing a double bond is oxygen (O₂).