Assertion : Valency of ferrous is +2.
Reason : Valency is the combining capacity of an element.

Options

A. If both assertion and reason are true and reason is the correct explanation
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

To analyze the assertion and reason provided in the question, we will break it down step by step.

### Step 1: Understand the Assertion
The assertion states that "the valency of ferrous is +2."
- **Explanation**: Ferrous refers to iron in its +2 oxidation state, which means it can combine with other elements by losing two electrons. Therefore, the assertion is true.

### Step 2: Understand the Reason
The reason states that "valency is the combining capacity of an element."
- **Explanation**: Valency indeed refers to the ability of an element to combine with other elements, which is often represented by the charge it carries when it forms compounds. This definition is also true.

### Step 3: Evaluate the Relationship Between Assertion and Reason
Now, we need to determine if the reason correctly explains the assertion.
- **Explanation**: While both statements are true, the reason does not specifically explain why the valency of ferrous is +2. It only defines what valency is, without linking it directly to the ferrous state of iron.

### Conclusion
Based on the analysis:
- The assertion is true.
- The reason is true, but it does not provide a correct explanation for the assertion.

Thus, the correct answer is that both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

### Final Answer
Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

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