The property, which is not characteristic of transition metals:

Options

A. variable oxidation states
B. tendency to form complexes
C. formation of coloured compounds
D. None of these

Answer

To solve the question regarding the property that is not characteristic of transition metals, we need to analyze the properties typically associated with transition metals.

**Step 1: Identify the characteristics of transition metals.**
Transition metals are defined as elements that have partially filled d orbitals. This unique electronic configuration gives rise to several characteristic properties, including:
- Variable oxidation states
- Formation of colored compounds
- Ability to form complex ions

**Step 2: Analyze the properties listed in the question.**
We need to evaluate the properties provided in the question and determine which one does not fit the characteristics of transition metals. Common properties of transition metals include:
- **Variable oxidation states**: Transition metals can exhibit multiple oxidation states due to the presence of unpaired electrons in their d orbitals.
- **Formation of colored compounds**: The presence of unpaired electrons allows for d-d transitions, which result in the absorption of specific wavelengths of light, leading to color.
- **Formation of complexes**: Transition metals can coordinate with ligands, forming complex ions due to their ability to accept electron pairs.

**Step 3: Identify the non-characteristic property.**
After reviewing the properties, we can conclude that any property that does not align with the above characteristics is the answer to the question. For example, properties such as:
- High electronegativity
- Lack of variable oxidation states
- Non-metallic behavior

These do not align with the characteristics of transition metals.

**Conclusion:**
The property that is not characteristic of transition metals is likely to be one of the non-metallic behaviors or properties that do not involve d orbital interactions.