Increasing pKₐ values of o-, m- and p- nitrobenzoic acid is
o- < p- correct as per chemistry principle.
Ref: NCERT Chemistry Class XI and XII
#isomerism
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Which complex shows geometrical isomerism?
[Co(NH₃)4Cl₂]+ is octahedral and can form cis and trans isomers due to two Cl^- ligands. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.
Which complex exhibits linkage isomerism?
[Co(NH₃)5(SCN)]^{2+ has the ambidentate ligand SCN^-, which can bind via S or N, showing linkage isomerism. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.
Which complex shows ionization isomerism with [Co(NH₃)5NO₂]Cl₂ ?
[Co(NH₃)5Cl]NO₂Cl swaps Cl^- and NO₂^- with [Co(NH₃)5NO₂]Cl₂, exhibiting ionization isomerism. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.
Which type of isomerism is exhibited by CH₃CH₂OCH₃ and CH₃CH₂CH₂OH ?
Both have the formula C₃H₈O but differ in functional groups (ether vs. alcohol), indicating functional isomerism. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.
Which type of isomerism is exhibited by CH₃CH₂CH₂CH₂OH and CH₃CH(OH)CH₂CH₃ ?
Both have the formula C₄H₉OH but differ in the position of the -OH group (carbon 1 vs. carbon 2), indicating position isomerism. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Organic Chemistry - Basic Principles, Hydrocarbons and Reaction Mechanisms, Topic: Nomenclature, isomerism and reaction types.
How many monobromo isomers are possible for CH₃CH₂CH(CH₃)CH₃ ?
2-Methylbutane has four unique carbon positions for Br substitution (C₁, C₂ with methyl, C₃, C₄), yielding 4 isomers.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility
How many structural isomers are possible for C₄H₉Cl ?
For C₄H₉Cl , the isomers are 1-chlorobutane, 2-chlorobutane, 1-chloro-2-methylpropane, and 2-chloro-2-methylpropane, totaling 4.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
Which of the following is an example of ionization isomerism?
Ionization isomerism involves exchange of ligands and counter ions. [Co(NH₃)5SO₄]Br and [Co(NH₃)5Br]SO₄ differ in which ion is inside/outside the coordination sphere.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Which pair represents coordination isomerism?
Ligand exchange between coordination spheres shows coordination isomerism.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
Which pair represents coordination isomerism?
Coordination isomerism involves ligand exchange between coordination sphere and counter ions.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
What is the geometry of [Co(en)2Cl₂]+ in its trans form?
[Co(en)2Cl₂]+ (Co₃+, d6) with 2 en and 2 Cl− is octahedral, and the trans isomer has Cl− ligands opposite each other.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
