Assertion : In several properties, hydrogen resembles halogens of group 17.
Reason : Both hydrogen and halogens are short of one electron to attain a stable configuration similar to those of noble gases.

Options

A. If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.
B. If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.
C. If Assertion is CORRECT but Reason is INCORRECT.
D. If Assertion is INCORRECT but Reason is CORRECT.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "In several properties, hydrogen resembles halogens of group 17." This means that hydrogen shares certain characteristics with the halogens (like fluorine, chlorine, bromine, etc.).

**Hint:** Look for similarities in properties between hydrogen and halogens.

### Step 2: Identify Similar Properties
To verify the assertion, we can list some properties where hydrogen and halogens resemble each other:

1. **Electronic Configuration**:
- Hydrogen has an electronic configuration of 1s¹.
- Halogens have an electronic configuration that ends in p⁵ (e.g., fluorine: 1s² 2s² 2p⁵).
- Both are one electron short of achieving a stable noble gas configuration.

2. **Diatomic Nature**:
- Hydrogen exists as H₂, and halogens exist as diatomic molecules (e.g., Cl₂, F₂).

3. **Tendency to Gain Electrons**:
- Both hydrogen and halogens have a tendency to gain one electron to form anions (H⁻ for hydrogen and Cl⁻ for chlorine).

4. **Non-metallic Character**:
- Both hydrogen and halogens are non-metals and poor conductors of heat and electricity.

**Hint:** Think about how these properties relate to their positions in the periodic table.

### Step 3: Understand the Reason
The reason states that "Both hydrogen and halogens are short of one electron to attain a stable configuration similar to those of noble gases." This is a true statement because it explains why both hydrogen and halogens exhibit similar chemical behavior.

**Hint:** Consider how electron configuration influences chemical properties.

### Step 4: Conclusion
Since both the assertion and the reason are true, and the reason correctly explains the assertion, we conclude that the answer is:

**Both assertion and reason are correct, and the reason is the correct explanation of the assertion.**

### Final Answer
The correct option is: Both assertion and reason are correct, and the reason is the correct explanation of the assertion.

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