Match List I with List II
| List I | List II |
| A. Cyanocobalamine | I. Hydrogenation of Alkenes |
| B. Wilkinson's catalyst | II. Antipernicious anaemia factor |
| C. D-Penicillamine | III. Refining of \(Ni\) |
| D. Mond's Process | IV. Treatment of toxic effects of copper |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-II, B-I, C-IV, D-III
Coordination compounds have many uses in biology, medicine, catalysis and metallurgy. Each item here is one of these uses.
(A) Cyanocobalamine — This matches (II) Antipernicious anaemia factor. Cyanocobalamine, vitamin B12, is a coordination compound of cobalt.
(B) Wilkinson’s catalyst — This matches (I) Hydrogenation of Alkenes. Wilkinson catalyst is the rhodium complex \( \ce{[(Ph3P)3RhCl]} \).
\( \ce{RCH=CH2 + H2} \xrightarrow{\ce{[(Ph3P)3RhCl]}} \ce{RCH2CH3} \)
(C) D-Penicillamine — This matches (IV) Treatment of toxic effects of copper. It is a chelating ligand that binds excess copper (and iron) in the body so that it can be removed.
(D) Mond’s Process — This matches (III) Refining of Ni. Impure nickel forms volatile \( \ce{Ni(CO)4} \), which decomposes at a higher temperature to give pure nickel.
\( \ce{Ni + 4CO} \xrightarrow{\text{330-350 K}} \ce{Ni(CO)4} \xrightarrow{\text{450-470 K}} \ce{Ni + 4CO} \)
Shortcut: (A)-(II) and (B)-(I) leave Options (2) and (3); (C)-(IV) leaves only Option (2).
NCERT (2026-27 edition):
Importance and Applications of Coordination Compounds – …
