NEETChemistryd and f Block Elements
Match List-I with List-II. List-I List-II (A) Catalytic activity (I) Stable half-filled t_ 2g configuration (B) Interstitial compounds (II) Similar atomic radii of transition metals (C) Cr ²⁺ acts as a strong reducing agent (III) Ability to adopt multiple oxidation states (D) Alloy formation (IV) Trapping of small atoms like H, C or N in crystal lattice Choose the correct answer from the options given below:
Options
- A(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
- B(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
- C(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
- D(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Correct answer
C. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Step-by-step solution
Catalytic activity of transition metals is due to their ability to adopt multiple oxidation states and form complexes. Interstitial compounds are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals. Cr ²⁺ is a strong reducing agent because its oxidation to Cr ³⁺ results in a stable half-filled t_ 2g ³ configuration in aqueous medium. Alloys are readily formed by transition metals because of their similar atomic radii, allowing atoms of one metal to replace those of another in th