Which of the following is not characteristic of an oxidation reaction?

Options

A. Oxidation reactions can involve removal of electrons
B. Oxidation reactions can involve removal of a hydrogen atom
C. Oxidation reactions release energy
D. None of the above

Explanation

To determine which of the following is not characteristic of an oxidation reaction, we will analyze each option step by step.

### Step 1: Understand Oxidation Reactions
Oxidation reactions are defined as processes where there is a loss of electrons from a molecule, atom, or ion. This results in an increase in the oxidation state of the substance undergoing oxidation.

**Hint:** Remember that oxidation is associated with the loss of electrons.

### Step 2: Analyze the Options
1. **Oxidation reactions involve removal of electrons.**
- This statement is true. Oxidation is characterized by the loss of electrons.

2. **Oxidation reactions involve removal of hydrogen atoms.**
- This statement is not necessarily true. While some oxidation reactions may involve the removal of hydrogen, it is not a defining characteristic of all oxidation reactions. Therefore, this option is likely the answer we are looking for.

3. **Oxidation reactions release energy.**
- This statement is true. Many oxidation reactions are exothermic, meaning they release energy during the process.

4. **None of the above.**
- This option implies that all previous statements are characteristics of oxidation reactions, which is incorrect since we have identified one that is not.

### Step 3: Conclusion
Based on the analysis of the options, the correct answer is:
**B. Oxidation reactions involve removal of hydrogen atoms.** This is not a characteristic of oxidation reactions.

**Final Answer:** Option B is the correct answer.