A reversible reaction is one which

Options

A. proceeds in one direction
B. proceeds in both directions
C. proceeds spontaneously
D. all the statements are wrong

Answer

**Step-by-Step Solution:**

1. **Understanding Reversible Reactions:**
- A reversible reaction is defined as a chemical reaction where the products can react to form the original reactants. This means that the reaction can proceed in both the forward and backward directions.

2. **Forward and Backward Reactions:**
- In a reversible reaction, the reactants are converted into products in the forward direction. Conversely, the products can also be converted back into the reactants in the backward direction.

3. **Example of a Reversible Reaction:**
- A classic example of a reversible reaction is the synthesis of ammonia:
\[ N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g) \]
- In this reaction, nitrogen and hydrogen gases react to form ammonia. The reaction can also proceed in the reverse direction, where ammonia can decompose back into nitrogen and hydrogen gases.

4. **Identifying the Correct Statement:**
- Given the options in the question, the correct statement about reversible reactions is that they proceed in both directions (forward and backward).

5. **Conclusion:**
- Therefore, the answer to the question "A reversible reaction is one which..." is that it proceeds in both directions.

**Final Answer:**
- A reversible reaction is one which proceeds in both directions.

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