NEET 2026 (Phase 1) · ChemistryPrevious Year Question
Match List I with List II: List I (Transition metal/compound/complex) (a) (b) (c) (d) Ni complex List II (Catalytic Role) (i) Preparation of ammonia from / mixture (ii) Polymerisation of alkynes (iii) Preparation of and (iv) Oxidation of ethyne to ethanal Choose the correct answer from the options given below:
Answer: (D) (d) A-III, B-I, C-IV, D-II. \textbf{Answer:} (d) A-III, B-I, C-IV, D-II \textbf{Solution:} is the catalyst in the Contact process for manufacturing (oxidation involving ), so A-III.
- A.(a) A-III, B-IV, C-I, D-II
- B.(b) A-IV, B-I, C-III, D-II
- C.(c) A-II, B-I, C-IV, D-III
- D.(d) A-III, B-I, C-IV, D-II✓
Correct Answer
(D) (d) A-III, B-I, C-IV, D-II
Solution & Explanation
\textbf{Answer:} (d) A-III, B-I, C-IV, D-II \textbf{Solution:} is the catalyst in the Contact process for manufacturing (oxidation involving ), so A-III. is the catalyst in the Haber process for making ammonia from and , so B-I. catalyses the Wacker oxidation of ethyne (and alkenes) to give ethanal, so C-IV. Nickel complexes are used in the polymerisation of alkynes (Reppe-type reactions), so D-II. The correct match is A-III, B-I, C-IV, D-II.
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