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NEET UG Organic Chemistry: Some Basic Principles and Techniques — practice questions — page 2

Explore 101 free Organic Chemistry: Some Basic Principles and Techniques questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Organic Chemistry: Some Basic Principles and Techniques questions and exercises with answers

Showing questions 31–60 of 101.

As per your syllabus, a CARBANION has the central carbon in which hybridisation and shape?Read the answer and worked solution →As per your syllabus, a species formed by homolysis with an unpaired electron is called which?Read the answer and worked solution →As per your syllabus, a NUCLEOPHILE is best described as which kind of species?Read the answer and worked solution →As per your syllabus, which of these is best classified as an ELECTROPHILE?Read the answer and worked solution →As per your syllabus, the INDUCTIVE EFFECT in a chain of σ-bonds is best described as which?Read the answer and worked solution →As per your syllabus, the inductive effect typically becomes vanishingly small after how many intervening bonds?Read the answer and worked solution →As per your syllabus, which group acts as an ELECTRON-DONATING group by inductive effect (+I)?Read the answer and worked solution →As per your syllabus, in CH₃-CH₂-CH₂-Br, the inductive effect is felt LEAST in which bond?Read the answer and worked solution →As per your syllabus, the experimentally observed C-C bond length in benzene is which value?Read the answer and worked solution →As per your syllabus, the POSITIVE RESONANCE effect (+R) transfers electrons in which direction?Read the answer and worked solution →As per your syllabus, the NEGATIVE RESONANCE effect (-R) transfers electrons in which direction?Read the answer and worked solution →As per your syllabus, which substituent shows a -R (negative resonance) effect?Read the answer and worked solution →As per your syllabus, the ELECTROMERIC EFFECT (E) is best described as which kind of effect?Read the answer and worked solution →As per your syllabus, when inductive and electromeric effects oppose each other, which effect predominates?Read the answer and worked solution →As per your syllabus, HYPERCONJUGATION involves the delocalisation of which type of electrons?Read the answer and worked solution →As per your syllabus, in the ethyl cation (CH₃CH₂⁺), the C-H σ-electrons of which group delocalise into the empty p orbital?Read the answer and worked solution →Match each functional group to its compound class.Read the answer and worked solution →Alkane, alkene or alkyne?Read the answer and worked solution →Key in the hydrogen countRead the answer and worked solution →Which one does NOT belong?Read the answer and worked solution →Electrophile or nucleophile?Read the answer and worked solution →Order the steps of IUPAC namingRead the answer and worked solution →Tap every homologous series featureRead the answer and worked solution →Which type of bond transmits the inductive effect along a carbon chain?Read the answer and worked solution →Alkyl groups attached to a carbon chain show which electronic effect?Read the answer and worked solution →How does the inductive effect change as distance from the substituent increases?Read the answer and worked solution →The inductive effect is best described as which kind of electronic effect?Read the answer and worked solution →In a polar covalent bond, the more electronegative atom carriesRead the answer and worked solution →Acetic acid is weaker than formic acid because its methyl groupRead the answer and worked solution →Which of these acids is the strongest in water?Read the answer and worked solution →

Worked practice questions

As per your syllabus, a CARBANION has the central carbon in which hybridisation and shape?

  1. sp linear
  2. sp³ tetrahedral
  3. sp² trigonal planar
  4. sp³ pyramidal
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Correct answer: D. sp³ pyramidal

syllabus Fig 8.3(b): carbanion is sp³ with a lone pair ⇒ pyramidal (like NH₃).

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As per your syllabus, a species formed by homolysis with an unpaired electron is called which?

  1. Carbanion
  2. Free radical
  3. Nucleophile
  4. Carbocation
Show answer and solution

Correct answer: B. Free radical

Your syllabus: homolytic cleavage gives free radicals (single unpaired electron on each fragment).

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As per your syllabus, a NUCLEOPHILE is best described as which kind of species?

  1. Electron-pair donor
  2. Proton donor
  3. Neutral always
  4. Electron-pair acceptor
Show answer and solution

Correct answer: A. Electron-pair donor

Your syllabus: nucleophile (Nu:) donates an electron pair to form a new bond at an electrophilic centre.

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