Chemistry · d and f Block Elements
JEE Main 2026 — 8 April, Evening Shift — Question 52
Given below are two statements for catalytic properties of transition metals :
Statement I : First row transition metals which act as catalyst utilise their 3d electrons only for formation of bonds between reactant molecules and atoms on the surface of catalyst.
Statement II : There is increase in the concentration of reactants on the surface of catalyst which strengthens the bonds in reacting molecules.
In the light of the above statements, choose the correct answer from the option given below :
- Option A:
Both Statement I and Statement II are correct
- Option B:Correct
Both Statement I and Statement II are incorrect
- Option C:
Statement I is correct but Statement II are incorrect
- Option D:
Statement I is incorrect but Statement II are correct
Answer: B
Step-by-step solution
First row transition metals utilize 3d and 4s electrons for bonding on the catalyst surface. ∴ Statement 1 is incorrect Adsorption increases reactant concentration on the catalyst surface and weakens bonds facilitating formation of activated complex and lowering activation energy. ∴ Statement 2 is incorrect
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2026
- Subject
- Chemistry
- Chapter
- d and f Block Elements
- Topic
- Introduction and Properties of Transition Elements