Assertion : Ionisation enthalpy is always negative.
Reason : Energy is always released when electrons are removed.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion
B. If both assertion and reason are true but reason is not a correct explanation of the assertion
C. If assertion is true but reason is false
D. If the assertion and reason both are false

Explanation

To analyze the given assertion and reason, we will break down the concepts of ionization enthalpy and energy changes during the ionization process.

### Step 1: Understanding Ionization Enthalpy
- **Definition**: Ionization enthalpy (or ionization energy) is the amount of energy required to remove an electron from an atom or ion in its gaseous state.
- **Nature of Ionization Enthalpy**: Ionization enthalpy is always a positive quantity because energy must be supplied to overcome the attraction between the negatively charged electron and the positively charged nucleus.

### Step 2: Evaluating the Assertion
- **Assertion**: "Ionization enthalpy is always negative."
- **Evaluation**: This statement is **false**. As established, ionization enthalpy is a positive value because it represents the energy input required to remove an electron.

### Step 3: Understanding the Reason
- **Reason**: "Energy is always released when electrons are removed."
- **Evaluation**: This statement is also **false**. When an electron is removed from an atom, energy must be supplied (not released) to overcome the attractive forces, which means energy is absorbed, not released.

### Step 4: Conclusion
- Both the assertion and the reason are false. Therefore, the correct answer is that neither the assertion nor the reason is true.

### Final Answer
- **Assertion**: False
- **Reason**: False

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