Question

Match the metals (Column I) with the coordination compound(s) / enzyme(s) (Column II)

Column-I Metals		Column-II Coordination compound(s) / Enzyme(s)
(A)	Co	(i)	Wilkinson catalyst
(B)	Zn	(ii)	Chlorophyll
(C)	Rh	(iii)	Vitamin $B_{12}$
(D)	Mg	(iii)	Carbonic anhydrase

• A. A-ii ; B-i ; C-iv ; D-iii
• B. A-iii ; B-iv ; C-i ; D-ii
• C. A-iv ; B-iii ; C-i ; D-ii
• D. A-i ; B-ii ; C-iii ; D-iv

Answer 1

Answer: (B)

(i) Wilkinson catalyst: $RhCl{\left(PP{h}_3\right)}_3$
(ii) Chlorophyll : $C_{55}{H}_{72}{O}_5{N}_{4}Mg$
(iii) Vitamin $B_{12}$ (also known as cyanocobalamin) contain cobalt.
(iv) Carbonic anhydrase contains a zinc ion.