In the course of a chemical reaction an oxidant -

Options

A. Loses electron
B. Gain electron
C. Both loses and gain electrons
D. Electron change does not occur

Answer

To solve the question regarding the behavior of an oxidant in a chemical reaction, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Role of an Oxidant:**
- An oxidant, also known as an oxidizing agent, is a substance that facilitates the oxidation of another substance. In this process, the oxidant itself undergoes reduction.

2. **Defining Oxidation and Reduction:**
- Oxidation is defined as the loss of electrons, while reduction is the gain of electrons. Therefore, in any redox reaction, the oxidizing agent gains electrons and is reduced.

3. **Analyzing the Options:**
- We need to evaluate the options provided (A, B, C, D) based on our understanding of oxidants:
- **Option A:** "An oxidant loses electrons." (Incorrect, as oxidants gain electrons.)
- **Option B:** "An oxidant gains electrons." (Correct, as oxidants are reduced by gaining electrons.)
- **Option C:** "An oxidant does not change." (Incorrect, as oxidants change by being reduced.)
- **Option D:** "An oxidant is always a metal." (Incorrect, as oxidants can be non-metals as well.)

4. **Conclusion:**
- Based on the analysis, the correct answer is the option that states that an oxidant gains electrons.

### Final Answer:
The correct option is: **B. An oxidant gains electrons.**

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