Question:medium
Statement I: d-Block elements utilize their only 3d electrons for bonding on the surface of catalyst.
Statement II: This leads to strengthening of bonds in the reacting molecules.
Statement I: d-Block elements utilize their only 3d electrons for bonding on the surface of catalyst.
Statement II: This leads to strengthening of bonds in the reacting molecules.
Statement II: This leads to strengthening of bonds in the reacting molecules.
Updated On: Apr 13, 2026
- Both Statement I and Statement II are correct.
- Statement I is correct but Statement II is incorrect.
- Statement I is incorrect but Statement II is correct.
- Both Statement I and Statement II are incorrect.
Show Solution
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
Evaluate the mechanism of catalytic action of transition metals (d-block elements).
Step 2: Detailed Explanation:
Regarding Statement-I:
Transition metals utilize both their $ns$ and $(n-1)d$ electrons for bonding on the surface of the catalyst. Restricting it to "only 3d" is incorrect.
Regarding Statement-II:
The adsorption of reactant molecules on the surface of the catalyst actually leads to the weakening of bonds within the reacting molecules, which lowers the activation energy and facilitates the reaction. It does not lead to the "strengthening" of bonds.
Since both statements are factually wrong, option (4) is correct.
Step 3: Final Answer:
Both Statement I and Statement II are incorrect.
Evaluate the mechanism of catalytic action of transition metals (d-block elements).
Step 2: Detailed Explanation:
Regarding Statement-I:
Transition metals utilize both their $ns$ and $(n-1)d$ electrons for bonding on the surface of the catalyst. Restricting it to "only 3d" is incorrect.
Regarding Statement-II:
The adsorption of reactant molecules on the surface of the catalyst actually leads to the weakening of bonds within the reacting molecules, which lowers the activation energy and facilitates the reaction. It does not lead to the "strengthening" of bonds.
Since both statements are factually wrong, option (4) is correct.
Step 3: Final Answer:
Both Statement I and Statement II are incorrect.
Was this answer helpful?
0
Top Questions on Inorganic chemistry
- Identify the incorrect statement about PCl5:
- NEET (UG) - 2024
- Chemistry
- Inorganic chemistry
- Out of the following complex compounds, which of the compound will be having the minimum conductance in solution?
- NEET (UG) - 2025
- Chemistry
- Inorganic chemistry
- Given below are two statements:
Statement I: Like nitrogen that can form ammonia, arsenic can form arsine.
Statement II: Antimony cannot form antimony pentoxide.
In the light of the above statements, choose the most appropriate answer from the options given below:- NEET (UG) - 2025
- Chemistry
- Inorganic chemistry
Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and C are not the same.
C. $Ar, K^{+}, Cl^{–}, Ca^{2+} and S^{2–}$ are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si $>$ Al $>$ Mg $>$ Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
Choose the correct answer from the options given below:- NEET (UG) - 2025
- Chemistry
- Inorganic chemistry
- Want to practice more? Try solving extra ecology questions todayView All Questions
