Organic Chemistry Isomerism and Functional Groups
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Questions and Answers

What is the total maximum marks allotted for the examination?

  • 50
  • 150
  • 75 (correct)
  • 100
  • Which of these is NOT a part of the examination?

  • Part C
  • Part D (correct)
  • Part B
  • Part A
  • How many questions in Part C must be answered?

  • All
  • 7 (correct)
  • 5
  • 10
  • What is the subject of the examination?

    <p>Pharmaceutical Organic Chemistry-IV (C)</p> Signup and view all the answers

    What is the total time allotted for the examination?

    <p>Three hours (B)</p> Signup and view all the answers

    Which of the following compounds would be expected to exhibit geometric isomerism (cis-trans isomerism)?

    <p>2-Butene (B)</p> Signup and view all the answers

    Which of the following statements correctly describes the functional group present in the molecule represented by -C-O-C- ?

    <p>The functional group is an ether, characterized by an oxygen atom bonded to two carbon atoms. (C)</p> Signup and view all the answers

    Which of the following is the most basic among the given compounds?

    <p>Trimethylamine ((CH<sub>3</sub>)<sub>3</sub>N) (D)</p> Signup and view all the answers

    Which of the following reactions is NOT a characteristic reaction of alkyl halides?

    <p>Electrophilic addition reaction (D)</p> Signup and view all the answers

    Which of the following would be considered a primary (1°) aliphatic amine?

    <p>Ethylamine (CH<sub>3</sub>CH<sub>2</sub>NH<sub>2</sub>) (C)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a ketone?

    <p>Ketones are typically more reactive than aldehydes. (C)</p> Signup and view all the answers

    Which of the following compounds would undergo a nucleophilic substitution reaction with a strong nucleophile like hydroxide ion (OH-)?

    <p>Bromoethane (CH<sub>3</sub>CH<sub>2</sub>Br) (A)</p> Signup and view all the answers

    Which of the following compounds would be expected to produce a positive Tollens' test, indicating the presence of an aldehyde functional group?

    <p>Formaldehyde (HCHO) (B)</p> Signup and view all the answers

    Which of the following statements is TRUE regarding the reactivity of acyl halides?

    <p>Acyl halides are more reactive than esters and amides due to the presence of a good leaving group (halide ion). (C)</p> Signup and view all the answers

    Which of the following pairs of molecules represents functional isomers?

    <p>Ethanol (CH<sub>3</sub>CH<sub>2</sub>OH) and Dimethyl ether (CH<sub>3</sub>OCH<sub>3</sub>) (C)</p> Signup and view all the answers

    Flashcards

    Pharmaceutical Organic Chemistry-IV

    A course focusing on organic chemistry principles relevant to pharmacy.

    Examination Format

    The structure of the exam with three parts: A, B, and C.

    Part A Questions

    All questions must be answered, each worth 1 mark.

    Part B Questions

    Students choose 2 questions to answer, each worth 10 marks.

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    Part C Questions

    Answer any 7 questions from this section, each worth 5 marks.

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    Isomers

    Molecules with the same molecular formula but different structures.

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    LPG Composition

    LPG mainly consists of Butane and Isobutane.

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    Carbon Hybridization

    Carbon in alkenes is sp² hybridized due to double bonds.

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    Lucas Test

    A test that determines the type of alcohol present.

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    Acetaldehyde Reaction

    Reacts with Fehling's solution to form Cu₂O.

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    Ketone Example

    Acetone is a common example of a ketone.

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    Gabriel Phthalimide Reaction

    Used for synthesizing primary aliphatic amines.

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    Alkane Substitution

    Alkyl halides undergo nucleophilic substitution reactions.

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    Carbylamine Test

    Indicates the presence of primary amines.

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    Saponification

    Basic hydrolysis of esters to form soap.

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    Study Notes

    Multiple Choice Questions (Part A)

    • Isomers with the same molecular formula but different functional groups are called functional isomers.
    • LPG (liquefied petroleum gas) is primarily a mix of butane and isobutane.
    • Carbon atoms in a double bond are sp² hybridized.
    • Lucas test identifies alcohols.
    • Acetaldehyde reacts with Fehling's solution to produce CuO.
    • Acetone is an example of a ketone.
    • Chloroform, exposed to light and air, produces phosgene.
    • Gabriel phthalimide reaction synthesizes primary aliphatic amines.
    • Trimethylamine is the most basic among the given options.
    • 2-Butene exhibits geometric isomerism.
    • The functional group -C-O-C- represents an ether.
    • Primary amines give a positive carbylamine test.
    • C=O is a bond present in the carboxylic acid functional group.
    • Alkyl halides undergo nucleophilic substitution reactions.
    • N,N-dimethylthanamide is a structure; the provided format does not specify the formula for this compound.
    • Methanol has the lowest solubility in water, compared to the other given alcohols.
    • Saponification is the basic hydrolysis of esters.
    • The most stable acid derivatives are amides.
    • Benzaldehyde among the given aldehydes can undergo aldol reactions.

    Part B (Short Answer Questions)

    • SN1 and SN2 reactions are nucleophilic substitution reactions with different mechanisms and reaction rates. Factors affecting these reactions are discussed.
    • Several name reactions are mentioned; however, just the names are provided.
    • Halogenation of alkanes, Cannizzaro reaction, nucleophilic addition reactions, and Diels-Alder reactions are a few.

    Part C (Essay Questions)

    • Markownikoff's and Anti-Markownikoff's rules describe the addition of reagents to alkenes.
    • E1 and E2 reactions relate to elimination reactions.
    • Ethyl chloride and chloroform are discussed in terms of structure and applications.
    • The basicity of aliphatic amines is influenced by substituents.
    • The acid-catalyzed and base-catalyzed hydrolysis of amides are explained.
    • Methods to distinguish between primary, secondary, and tertiary amines.
    • Aldehydes and ketones are collectively called carbonyl compounds and Perkin condensation is discussed.
    • Acetic acid is detailed. Key comparisons between formic and acetic acid are provided..
    • Qualitative tests for alcohols are summarized.
    • Markownikoff's and anti-Markownikoff's rules are explained.

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    Description

    This quiz covers essential concepts in organic chemistry, focusing on isomerism, functional groups, and chemical reactions involving various organic compounds. Test your knowledge on functional isomers, hybridization, and important tests used in organic analysis.

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