Question

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

Column-I	Column -II
(A) Co	(i) Wilkinson catalyst
(B) Zn	(ii) Chlorophyll
(C) Rh	(iii) Vitamin ${{B}_{12}}$
(D) Mg	(iv) 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

Hint Coordination compounds are those compounds in which metal atoms are surrounded by ligands which electrons to the metal atom. Mg is responsible for the photosynthetic pigment in plants, Co is a source of vitamin , Rh is used in the catalyst and Zn is used in the conversion of carbon dioxide to carbonic acid and vice-versa. Now, identify the correct option.

Complete step by step answer:
First of all, let’s discuss what are the coordination compounds. Coordination compounds are the special class of compounds in which the central metal atom is surrounded by ions or molecules beyond their normal valency. They are also called complex compounds.
Many biologically important compounds are the coordination compounds in which the complicated organic species were bound to metal ions. Example :- chlorophyll which is a coordination compound of magnesium , vitamin ${{B}_{12}}$ is a coordination compound of cobalt etc.
Wilkinson’s catalyst is the coordination compound of rhodium and its common name is chloridotris(triphenylphosphine) rhodium(I). it is mostly used as a catalyst in the hydrogenation of double bond i.e. alkenes.
Carbonic anhydrase is an enzyme as it contains the suffix ‘ase’ and contains Zn and it is used as catalyst in the conversion reactions of carbon dioxide to carbonic acid and vice-versa.
So, the correct matching of column I with the column II is as;

Column-I	Column -II
(A) Co	(i) Wilkinson catalyst (C)
(B) Zn	(ii) Chlorophyll (D)
(C) Rh	(iii) Vitamin ${{B}_{12}}$ (A)

Hence, option(B) is correct.

Note: Coordination compounds can exist both in the solid state as well as when dissolved in the water and do not completely lose their identity in the solution form and their properties are different from the constituents.