Class 11 • Chemistry • Chapter 8
Organic Chemistry - Some Basic Principles and Techniques
True & False Quiz
Classify. Name. Purify.
✓True
✗False
25
Questions
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Ch.8
Chapter
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XI
Class
Why True & False for Organic Chemistry - Some Basic Principles and Techniques?
How this format sharpens your conceptual clarity
🔵 This chapter builds the vocabulary and toolkit of organic chemistry — nomenclature, structure, and purification underpin every reaction studied afterward.
✅ T/F tests IUPAC naming rules, classification of organic compounds, electronic effects (inductive, resonance, hyperconjugation), and purification/analysis techniques.
🎯 The inductive effect operates through sigma bonds and weakens rapidly with distance — it is NOT the same as resonance, which requires a conjugated pi system.
📋
Read each statement carefully. Click True or False — instant feedback with explanation appears. Submit anytime; unattempted questions are marked Skipped.
Q 1
Organic chemistry mainly deals with carbon compounds except a few simple inorganic carbon compounds such as \(CO\), \(CO_2\), carbonates and bicarbonates.
Q 2
The synthesis of urea from ammonium cyanate supported the Vital Force Theory.
Q 3
Carbon exhibits catenation because it forms strong \(C-C\) covalent bonds.
Q 4
The tetravalency of carbon means that a carbon atom can normally form four covalent bonds.
Q 5
Methane contains one sigma bond and three pi bonds.
Q 6
Carbon atoms in ethene are \(sp^2\)-hybridized.
Q 7
The carbon atoms in ethyne possess \(sp\)-hybridization.
Q 8
A sigma bond is stronger than a pi bond because it is formed by greater orbital overlap.
Q 9
A triple bond consists of one sigma bond and two pi bonds.
Q 10
Every organic compound contains at least one pi bond.
Q 11
All members of a homologous series have identical molecular formulae.
Q 12
Successive members of a homologous series differ in molecular mass by \(14\) u.
Q 13
Alcohols contain the hydroxyl functional group \((-OH)\).
Q 14
Ethanol and dimethyl ether are functional isomers.
Q 15
In IUPAC nomenclature, the parent chain should contain the principal functional group whenever possible.
Q 16
Chain isomerism arises because of different arrangements of the carbon skeleton.
Q 17
The inductive effect operates through sigma bonds and is permanent in nature.
Q 18
The electromeric effect is a permanent effect present even in the absence of an attacking reagent.
Q 19
Resonance involves the delocalization of electrons without changing the positions of atoms.
Q 20
The actual structure of benzene is represented by a resonance hybrid rather than a single Kekulé structure.
Q 21
A nucleophile is an electron-pair acceptor.
Q 22
An electrophile is an electron-deficient species that accepts an electron pair.
Q 23
Homolytic bond fission produces ions.
Q 24
A tertiary carbocation is generally more stable than a primary carbocation.
Q 25
Electron-withdrawing groups generally stabilize carbocations by increasing electron density around the positively charged carbon.
Key Takeaways — Organic Chemistry - Some Basic Principles and Techniques
Core facts for CBSE Boards & exams
1
IUPAC nomenclature: longest carbon chain containing the principal functional group is numbered to give the lowest locants.
2
Homolytic fission gives free radicals (unpaired electrons); heterolytic fission gives carbocations/carbanions (both electrons go to one atom).
3
Inductive effect (I): permanent displacement of electrons along a sigma bond due to electronegativity difference; +I (electron releasing) and −I (electron withdrawing).
4
Resonance (mesomeric effect): delocalisation of pi electrons/lone pairs across a conjugated system, represented by multiple contributing structures.
5
Hyperconjugation: overlap of a C−H sigma bond with an adjacent empty/partially filled p-orbital, stabilising carbocations and alkenes.
6
Distillation separates liquids by boiling point; steam distillation suits steam-volatile substances; chromatography separates by differential adsorption/partition.
7
Qualitative analysis: Lassaigne's test detects N, S, halogens via fusion with sodium; quantitative analysis (Liebig, Kjeldahl, Carius) determines elemental composition.