JEE Main 20268 AprilEvening Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 8 April
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- d and f Block Elements
JEE Main 2026 · 8 April · Evening Shift · Chemistry · d and f Block Elements
Given below are two statements for catalytic properties of...
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 options given below:
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 options given below:
Options
- ABoth Statement I and Statement II are correct
- BBoth Statement I and Statement II are incorrect
- CStatement I is correct but Statement II is incorrect
- DStatement I is incorrect but Statement II is correct
Correct answer
B. Both Statement I and Statement II are incorrect
Step-by-step solution
Statement I is incorrect because first row transition metals utilise both 3d and 4s electrons for the formation of bonds between reactant molecules and atoms on the surface of the catalyst.
Statement II is incorrect because the increase in the concentration of reactants on the surface of the catalyst weakens the bonds in the reacting molecules, which lowers the activation energy.
Therefore, both Statement I and Statement II are incorrect.
Answer: Both Statement I and Statement II are incorrect
Statement II is incorrect because the increase in the concentration of reactants on the surface of the catalyst weakens the bonds in the reacting molecules, which lowers the activation energy.
Therefore, both Statement I and Statement II are incorrect.
Answer: Both Statement I and Statement II are incorrect