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#reaction mechanisms

21 public questions tagged with this topic.

Biochemistry and Aptitude and Reasoning

Enzymes catalyze reactions by

In biochemistry, enzyme catalysis and lipid structure dictates that substrate affinity, transition state stabilization and phospholipid composition govern function. Therefore selectively binding the transition state of a reaction with high affinity is correct as it reflects catalytic efficiency and membrane organization, supported by mechanistic studies and conserved across related systems.

Ref: Berg et al., Biochemistry, 9th Edition, Chapter 13, Metabolism and Bioenergetics, covers glycolysis, citric acid cycle, oxidative phosphorylation and NADH-linked reactions detailing biochemical principles.

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CHEMISTRY

Which type of halide is more resistant to nucleophilic substitution?

Aryl halides resist nucleophilic substitution due to resonance stabilization of the C-X bond. 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.

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CHEMISTRY

Which of the following is the correct order of reactivity towards electrophilic addition reactions?

Due to the availability of pi electrons, alkenes are more reactive than alkynes in electrophilic addition reactions. 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.

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CHEMISTRY

Which of the following compounds undergoes the Haloform reaction?

The Haloform reaction occurs in compounds containing the -COCH₃ group, such as acetophenone. 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.

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CHEMISTRY

Which compound undergoes aldol condensation?

Aldol condensation occurs in aldehydes and ketones containing at least one α-hydrogen. Acetaldehyde undergoes aldol condensation. 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.

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CHEMISTRY

Which of the following will undergo the haloform reaction?

Haloform reaction occurs with compounds containing the -COCH₃ group, such as acetophenone and methyl ketones. 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.

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CHEMISTRY

What is the product when C₆H₅NH₂ is treated with excess CH₃Cl in the presence of a base?

Aniline ( C₆H₅NH₂ ) with excess CH₃Cl and a base undergoes exhaustive alkylation to form C₆H₅N(CH₃)2 (N, N-dimethylaniline), a tertiary amine. 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: Relevant Chemistry topic covering principles and examples as per NCERT.

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CHEMISTRY

What happens when ethane is treated with excess chlorine in sunlight?

Ethane undergoes free radical substitution, leading to the formation of hexachloroethane. 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.

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CHEMISTRY

Which of the following reactions is an example of electrophilic substitution?

Halogenation, nitration, and sulphonation of benzene are electrophilic substitution reactions. 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.

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CHEMISTRY

What is the major product of Friedel-Crafts alkylation of anisole with ethyl chloride?

The ethyl group gets attached at the ortho and para positions due to the +M effect of the -OCH ₃ group. 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.

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