Which is correct statement about (hydride)?

Options

A. It is bronsted-Lowry base of `H_2`
B. It is resembles halide
C. It is isoelectronic of He
D. All of the above

Answer

To determine which statement about hydride is correct, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Hydride**:
- A hydride refers to the ion H⁻, which is the hydrogen ion that has gained an extra electron. This gives it a negative charge.

2. **Analyzing Option 1**:
- **Statement**: "It is Bronsted-Lowry base of H₂."
- **Explanation**: According to the Bronsted-Lowry theory, a base is a species that can accept protons (H⁺ ions). The hydride ion (H⁻) can accept a proton to form H₂ (hydrogen gas). Therefore, H⁻ is indeed the Bronsted-Lowry base of H₂.
- **Conclusion**: This statement is correct.

3. **Analyzing Option 2**:
- **Statement**: "It resembles halide."
- **Explanation**: Halide ions (like F⁻, Cl⁻, etc.) are formed when halogens gain an electron. Similarly, hydrogen can gain an electron to form H⁻, which gives it a resemblance to halide ions. Both have a complete outer shell (noble gas configuration) after gaining an electron.
- **Conclusion**: This statement is also correct.

4. **Analyzing Option 3**:
- **Statement**: "It is isoelectronic with helium."
- **Explanation**: The hydride ion (H⁻) has two electrons, while helium (He) also has two electrons. Isoelectronic species are those that have the same number of electrons. Therefore, H⁻ and He are isoelectronic.
- **Conclusion**: This statement is correct as well.

5. **Analyzing Option 4**:
- **Statement**: "All of these."
- **Explanation**: Since all the previous statements (1, 2, and 3) about hydride are correct, option 4, which states "all of these," is also correct.

### Final Answer:
The correct answer is **Option 4: All of these**.

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