Which of the following statement is correct

Options

A. Hydrogen has oxidation number -1 and +1
B. Hydrogen has same electronegativity as halogens
C. Hydrogen will not be liberated at anode
D. Hydrogen has same ionization potential as alkali metals

Explanation

To determine which statement about hydrogen is correct, we will analyze each option based on the information provided in the video transcript.

### Step-by-Step Solution:

1. **Analyze Option 1: Hydrogen has oxidation numbers of -1 and +1.**
- In compounds like H2O, hydrogen has an oxidation state of +1.
- In metal hydrides (like LiH), hydrogen has an oxidation state of -1.
- Therefore, hydrogen can indeed have oxidation states of -1 and +1.
- **Conclusion:** This statement is correct.

2. **Analyze Option 2: Hydrogen has the same electronegativity as halogens.**
- The electronegativity of hydrogen is 2.1.
- The electronegativities of halogens are: Fluorine (4.0), Chlorine (3.2), Bromine (3.0), Iodine (2.7), and Astatine (2.2).
- Since hydrogen's electronegativity (2.1) does not match any halogen, this statement is incorrect.
- **Conclusion:** This statement is incorrect.

3. **Analyze Option 3: Hydrogen will not be liberated at the anode.**
- During electrolysis of metal hydrides, H- ions (hydride ions) will migrate to the anode where they will lose electrons and form hydrogen gas (H2).
- Therefore, hydrogen is indeed liberated at the anode during this process.
- **Conclusion:** This statement is incorrect.

4. **Analyze Option 4: Hydrogen has the same ionization potential as alkali metals.**
- The ionization potential of hydrogen is higher than that of alkali metals (like lithium, sodium, etc.) due to its smaller atomic size and higher effective nuclear charge.
- Therefore, hydrogen does not have the same ionization potential as alkali metals.
- **Conclusion:** This statement is incorrect.

### Final Conclusion:
The only correct statement is Option 1: "Hydrogen has oxidation numbers of -1 and +1."

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