Which amongst the following contains double covalent bond?

Options

A. `C_(2)H_(2)`
B. `C_(2)H_(6)`
C. `C_(2)H_(4)`
D. `C_(3)H_(8)`

Explanation

To determine which compound contains a double covalent bond, we can follow these steps:

### Step 1: Understand the Types of Bonds
- **Single Covalent Bond**: Formed when two atoms share one pair of electrons (e.g., alkanes).
- **Double Covalent Bond**: Formed when two atoms share two pairs of electrons (e.g., alkenes).
- **Triple Covalent Bond**: Formed when two atoms share three pairs of electrons (e.g., alkynes).

### Step 2: Identify General Formulas
- **Alkanes (Single Bonds)**: General formula is \( C_nH_{2n+2} \).
- **Alkenes (Double Bonds)**: General formula is \( C_nH_{2n} \).
- **Alkynes (Triple Bonds)**: General formula is \( C_nH_{2n-2} \).

### Step 3: Analyze Given Compounds
Assuming the options provided are:
1. \( C_2H_2 \)
2. \( C_2H_6 \)
3. \( C_3H_6 \)
4. \( C_3H_8 \)

Now, we will check each compound against the general formulas.

### Step 4: Check Each Compound
1. **For \( C_2H_2 \)**:
- \( n = 2 \)
- Check: \( H = 2n \) → \( H = 2(2) = 4 \) (not matching)
- This corresponds to \( C_nH_{2n-2} \) (alkyne).

2. **For \( C_2H_6 \)**:
- \( n = 2 \)
- Check: \( H = 2n + 2 \) → \( H = 2(2) + 2 = 6 \) (matching)
- This corresponds to \( C_nH_{2n+2} \) (alkane).

3. **For \( C_3H_6 \)**:
- \( n = 3 \)
- Check: \( H = 2n \) → \( H = 2(3) = 6 \) (matching)
- This corresponds to \( C_nH_{2n} \) (alkene).

4. **For \( C_3H_8 \)**:
- \( n = 3 \)
- Check: \( H = 2n + 2 \) → \( H = 2(3) + 2 = 8 \) (matching)
- This corresponds to \( C_nH_{2n+2} \) (alkane).

### Step 5: Conclusion
From the analysis, the compound that contains a double covalent bond is \( C_3H_6 \), which corresponds to an alkene.

### Final Answer:
The compound that contains a double covalent bond is **\( C_3H_6 \)**.

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