Nascent hydrogen consists of

Options

A. hydrogen ions in the excited state
B. hydrogen molecules with excess energy
C. solvated protons
D. hydrogen atoms with excess energy

Answer

### Step-by-Step Solution:

1. **Understanding Nascent Hydrogen**:
- Nascent hydrogen refers to hydrogen that is in its atomic form (H) rather than molecular form (H₂). It is often described as "newly formed" or "freshly generated" hydrogen.

2. **Formation of Nascent Hydrogen**:
- Nascent hydrogen is produced when molecular hydrogen (H₂) is dissociated into atomic hydrogen (H) through various processes, such as electrolysis or passing an electric current through it.

3. **Characteristics of Nascent Hydrogen**:
- Nascent hydrogen is highly reactive compared to molecular hydrogen (H₂). This increased reactivity is due to the fact that atomic hydrogen has an unpaired electron, making it more likely to participate in chemical reactions.
- Additionally, nascent hydrogen possesses excess energy, which contributes to its high reactivity.

4. **Evaluating the Options**:
- Given the options:
- A) Hydrogen ions in excited state
- B) Hydrogen molecules with excess energy
- C) Solvated protons
- D) Hydrogen atom with excess energy
- The correct answer is option D: "Hydrogen atom with excess energy," as it accurately describes nascent hydrogen.

5. **Conclusion**:
- Therefore, nascent hydrogen consists of hydrogen atoms that are highly reactive and have excess energy.