Question detail
Why are transition metal compounds often used as catalysts?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Transition metals (A-level only)
Question
- A. They have low melting points.
- B. They can easily lose or gain electrons.
- C. They are always colored.
- D. They do not react with other substances.
Answer
They can easily lose or gain electrons.
Explanation
The ability of transition metals to change oxidation states by losing or gaining electrons enables them to facilitate chemical reactions, making them effective catalysts.
Common mistake
Misunderstanding Catalytic Activity
Students often confuse the role of transition metals as catalysts with their ability to change oxidation states, thinking that all transition metals can catalyze reactions equally.
To clarify, remember that transition metals act as catalysts due to their ability to provide a surface for reactions and their variable oxidation states. For example, iron (Fe) can catalyze the Haber process by forming different oxidation states that facilitate the reaction between nitrogen and hydrogen. This means that while many transition metals can act as catalysts, their effectiveness can vary based on the specific reaction conditions and the metal's properties.
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