Which of the following formula represents alkenes?

Options

A. `C_(n)H_(2n)`
B. `C_(n)H_(2n+2)`
C. `C_(n)H_(2n-2)`
D. `C_(n)H_(2n+1)`

Answer

To determine which formula represents alkenes, we can follow these steps:

### Step 1: Understand the General Formula for Alkenes
The general formula for alkenes is \( C_nH_{2n} \). This means that for every 'n' carbon atoms in an alkene, there are \( 2n \) hydrogen atoms.

### Step 2: Analyze Other Options
1. **\( C_nH_{2n+2} \)**: This formula represents alkanes, which are saturated hydrocarbons with single bonds.
2. **\( C_nH_{2n-2} \)**: This formula represents alkynes, which are unsaturated hydrocarbons containing triple bonds.
3. **\( C_nH_{2n-1} \)**: This formula represents alkyl groups, which are derived from alkanes by removing one hydrogen atom.

### Step 3: Identify the Correct Formula
From the analysis, we can conclude that the only formula that represents alkenes is \( C_nH_{2n} \).

### Final Answer
The formula that represents alkenes is \( C_nH_{2n} \).

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