Q11 / 75 · JEE Main 2026 (08 April Shift 2) · Chemistry

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:

  • A
    Both Statement I and Statement II are correct
  • Correct answer
    B
    Both Statement I and Statement II are incorrect
  • C
    Statement I is correct but Statement II is incorrect
  • D
    Statement I is incorrect but Statement II is correct

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

Hence, the correct answer is option: 'B'.

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