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NEET 2026
Exam
NEET
Year
2026
Subject
Chemistry
Chapter
Coordination Compounds

NEET 2026 · Chemistry · Coordination Compounds

Given below are two statements: Statement-I : [Fe(ox)_3]^ 3- is...

Given below are two statements:
Statement-I : [Fe(ox)3]3−[\text{Fe(ox)}_3]^{3-} is chiral.
Statement-II : trans−[Cr(H2O)2(ox)2]−\textit{trans}-[\text{Cr(H}_2\text{O})_2(\text{ox})_2]^- is chiral.
(Given : oxH2_2 = HOOC−-COOH)
In light of the above statements, choose the most appropriate answer from the options given below:

Options

  1. AStatement-I is incorrect but Statement-II is correct.
  2. BBoth Statement-I and Statement-II are correct.
  3. CBoth Statement-I and Statement-II are incorrect.
  4. DStatement-I is correct but Statement-II is incorrect.

Correct answer

D. Statement-I is correct but Statement-II is incorrect.

Step-by-step solution

Statement-I: [Fe(ox)3]3−[\text{Fe(ox)}_3]^{3-} is an octahedral complex of the type [M(AA)3][M(AA)_3]. It lacks any plane of symmetry or center of inversion. Hence, it is optically active and chiral. Statement-I is correct.

Statement-II: trans−[Cr(H2O)2(ox)2]−\textit{trans}-[\text{Cr(H}_2\text{O})_2(\text{ox})_2]^- is an octahedral complex of the type trans−[M(AA)2a2]\textit{trans}-[M(AA)_2a_2]. In the trans isomer, the two identical monodentate ligands are placed opposite to each other. This geometry possesses a plane of symmetry passing through the metal and the bidentate ligands, as well as a center of inversion. Hence, it is optically inactive and achiral. Statement-II is incorrect.

Therefore, Statement-I is correct but Statement-II is incorrect.

Answer: Statement-I is correct but Statement-II is incorrect.
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