Which of the following statements is NOT correct regarding the catalytic ability of transition metals?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → decrease the concentration of reactant at catalyst surface
Let's analyze the statements about transition metals as catalysts:
- Ability to exist in variable oxidation states
- True; allows them to participate in redox cycles and catalyze reactions.
- Decrease the concentration of reactant at catalyst surface
- Incorrect. Catalysts adsorb reactants, often increasing their effective concentration at the surface, not decreasing it.
- Activation energy is lowered
- True; catalysts provide an alternative pathway with lower activation energy.
- Weakens the bond in the reacting molecules
- True; adsorption on the metal surface often weakens bonds, facilitating reaction.