The ionisation of hydrogen atom would give rise to

Options

A. (a) hydride ion
B. (b) hydronium ion
C. (c) proton
D. (d) hydroxyl ion

Explanation

To solve the question "The ionization of hydrogen atom would give rise to," we can follow these steps:

### Step 1: Understand the Ionization Process
The ionization of an atom involves the removal of one or more electrons from the atom. For hydrogen, which has an atomic number of 1, this means it has one electron and one proton.

### Step 2: Identify the Result of Ionization
When a hydrogen atom undergoes ionization, it loses its only electron. This process can be represented as:
\[ \text{H} \rightarrow \text{H}^+ + e^- \]
Here, \( \text{H}^+ \) is the ion formed after losing the electron, and \( e^- \) is the electron that has been removed.

### Step 3: Determine the Nature of the Ion Formed
The ion \( \text{H}^+ \) is known as a proton because it consists of only one proton and no electrons. Therefore, the ionization of a hydrogen atom results in the formation of a proton.

### Step 4: Evaluate the Options
Now, let's evaluate the provided options:
- **Option A: Hydride ion (H⁻)** - This is formed when a hydrogen atom gains an electron, not loses one.
- **Option B: Hydronium ion (H₃O⁺)** - This is formed when water (H₂O) gains a proton, not directly from hydrogen ionization.
- **Option C: Proton (H⁺)** - This is the correct answer, as it is the result of hydrogen losing its electron.
- **Option D: Hydroxyl ion (OH⁻)** - This is a different ion formed from oxygen and hydrogen, not directly from hydrogen ionization.

### Conclusion
The ionization of a hydrogen atom gives rise to a proton (H⁺). Therefore, the correct answer is:
**Option C: Proton**

---