8 public questions tagged with this topic.
[Cr(en)2(H₂O)2]3+ is octahedral with 2 en (bidentate) and 2 H₂O (unidentate). The 2 en ligands create the propeller-like structure causing chirality.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Optical Isomerism and Linkage Ionisation Solvate
Optical isomerism occurs in chiral complexes. [Co(en)3]3+ (octahedral, with 3 bidentate en ligands) lacks a plane of symmetry, forming non-superimposable mirror images (d and l).
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Optical Isomerism and Linkage Ionisation Solvate
[Co(en)2(H₂O)Cl]2+ (octahedral) with 2 bidentate en, 1 H₂O, and 1 Cl− forms a chiral complex without symmetry.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Optical Isomerism and Linkage Ionisation Solvate
[Fe(en)2Cl₂]+ (octahedral) with 2 bidentate en and 2 Cl− can form a cis isomer that is chiral, lacking symmetry.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Optical Isomerism and Linkage Ionisation Solvate
Glycine is the correct choice because it does not accurately describe or belong to the category addressed in this question. In the context of Amino Acids Basics, the other options (Alanine, Cysteine, and Histidine) are all valid and well-established concepts. Glycine is either unrelated to the topic, describes a different biological process, or represents a common misconception. Questions framed as 'which is NOT' require students to identify the exception among otherwise correct statements, demanding comprehensive knowledge of the topic rather than recognition of a single fact.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 3
Fischer projection is the scientifically accurate answer to this question. Within the study of Amino Acids Basics, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Fischer projection directly address what is being asked. Among the other options, Optical rotation, Isoelectric point, and Side chain properties do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 3
All of the above is the scientifically accurate answer to this question. Within the study of Amino Acids Basics, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of All of the above directly address what is being asked. Among the other options, Wavelength of light, Temperature, and Concentration do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 3
Substituent priority is the scientifically accurate answer to this question. Within the study of Amino Acids Basics, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Substituent priority directly address what is being asked. Among the other options, Optical rotation, Protonation state, and Charge distribution do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 3
