Organic Chemistry: Some Basic Principles and Techniques

Organic Chemistry: Some Basic Principles and TechniquesNEET Chemistry · Class 11 · NCERT Chapter 8

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3 interactive concept widgets for Organic Chemistry: Some Basic Principles and Techniques. Drag any slider, change any number, and watch the formula and the answer update live. Built so you understand how each NEET problem actually works, not just the final number.

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Functional groups identification quiz (10 questions)

Inductive and resonance effect visualizer

IUPAC naming practice (8 questions)

Functional groups identification quiz

Ten flashcard-style questions on functional groups: identify the group from a description, name the class, and recall the key reactions. Scored with instant feedback.

Organic chemistry

Functional groups flashcard quiz

10-question quiz: identify the correct structure for each functional group. Instant feedback with explanation after each answer.

Q 1/10

Score: 0

Identify the structure of:

Alcohol

Contains: -OH (hydroxyl group)

-OH

-CHO

-COOH

-NH₂

Try this

Aldehyde vs Ketone: aldehyde (-CHO) is at the chain end; ketone (C=O) is in the middle.
Acid vs Ester: COOH has an -OH that can donate a proton; ester (-COO-R) has no acidic H.
Amide (-CONH₂) is less basic than amine (-NH₂) because the carbonyl withdraws electrons from N.

Inductive and resonance effects

Switch between inductive effect (chain visualisation, +I/−I groups) and resonance effect (benzene, phenol, aniline electron density maps). See how substituents activate or deactivate rings.

Organic chemistry

Inductive and resonance effects

Toggle between inductive (+I/-I) and resonance (+M/-M) visualizers. See how electron density shifts along chains and delocalizes in conjugated systems.

The inductive effect is the permanent polarization of sigma bonds due to electronegativity differences. It decreases along the chain.

CH₃

C₂H₅

NO₂

Propagation along C chain

CH₃

→

C(α)

effect: 80%

→

C(β)

effect: 50%

→

C(γ)

effect: 20%

Methyl (CH₃)

Pushes electron density toward the chain. Increases electron density at the alpha carbon. Stabilizes carbocations.

Strength order reference

−I (decreasing strength): F > OH > Cl > Br > I > COOH > CHO > CN > NO₂
+I (decreasing strength):C(CH₃)₃ > CH(CH₃)₂ > C₂H₅ > CH₃

Try this

Halogens are unusual: they are -I (electron withdrawing by induction) but +M (electron donating by resonance). Net effect: weakly deactivating but ortho/para directing in EAS.
Phenol is more acidic than cyclohexanol because the phenoxide ion is stabilized by resonance with the ring.
Aniline is a weaker base than methylamine because the lone pair on N is delocalized into the benzene ring.

IUPAC naming practice

Eight practice questions mixing name-to-structure and structure-to-name. Covers alkanes, alkenes, alkynes, haloalkanes, and alcohols with explanations.

Organic chemistry

IUPAC naming practice

8-question quiz with both name-to-structure and structure-to-name questions. Covers alkanes, alkenes, alkynes, alcohols, and haloalkanes.

Q 1/8 — Structure to name

Score: 0

CH₃-CH(CH₃)-CH₂-CH₃
(4-carbon chain with a methyl branch at C-2)

2-methylbutane

3-methylbutane

2-methylpropane

isopentane

Try this

Always find the longest continuous carbon chain first. Then give branches the lowest possible locants.
For alkenes/alkynes: number the chain so the multiple bond has the lowest locant, even if it means a branch gets a higher number.
Suffix priority: -oic acid > -al > -one > -ol > -amine. The principal characteristic group gets the lowest locant.

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Redox Reactions

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Hydrocarbons

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