Q.

Among the following which arc ambidentate ligands?
(i) SCN
(ii) NO−3
(iii) NO−2
(iv) C2O4-2
 

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a

(i) and (iii)
 

b

(i) and (iv)

c


 (ii) and (iv)

d

 (ii) and (iii)

answer is A.

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Detailed Solution

Ambidentate ligand has two or more donor atoms, but during complex formation, only one donor atom is attached to central metal. 

SCN ion has donor atoms N and S. It links to metal as either M−SCN or M−NCS.

 NO2−​ group has donor atoms N and O. It links to metal as either M−ONO or M−NO2​.

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Among the following which arc ambidentate ligands?(i) SCN–(ii) NO−3(iii) NO−2(iv) C2O4-2