Organic Chemistry Nucleophilic Substitution Quiz
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Questions and Answers

Which compound is most reactive towards SN1 reaction among the following?

  • 2-Bromo-2-methylbutane
  • tert-butyl bromide (correct)
  • 1-Bromopentane
  • 2-Bromopentane

    • Cyclohexyl chloride is more reactive towards nucleophilic substitution than chlorobenzene.

    True

    What is the major product formed when chlorobenzene is treated with methyl chloride in the presence of sodium metal and dry ether?

    Biphenyl

    1-Bromobutane undergoes ___ to yield but-2-ene.

    <p>β-elimination</p> Signup and view all the answers

    Of the following isomers of C4H9Br, which one is optically active?

    <p>2-Bromobutane</p> Signup and view all the answers

    Match the following compounds with their reactivity towards SN2 and SN1 reactions:

    <p>1-Bromopentane = Most reactive towards SN2 Cyclohexyl chloride = More reactive towards nucleophilic substitution tert-butyl bromide = Most reactive towards SN1 2-Methylbutane = Less reactive than its isomers towards SN2</p> Signup and view all the answers

    The presence of a -NO2 group at the ortho or para position decreases the reactivity of haloarenes towards nucleophilic substitution.

    <p>False</p> Signup and view all the answers

    Why is chloroform stored in dark colored bottles?

    <p>To avoid the formation of phosgene.</p> Signup and view all the answers

    Which compound is a stronger acid than acetic acid?

    <p>Benzoic acid</p> Signup and view all the answers

    Methanal is less reactive towards nucleophilic addition than ethanal.

    <p>False</p> Signup and view all the answers

    What is the IUPAC name of the compound with the structure CH3-CH=CH-CHO?

    <p>But-3-enal</p> Signup and view all the answers

    The reaction of propanal with 2 moles of CH3OH in the presence of dry HCl will form a __________.

    <p>acetal</p> Signup and view all the answers

    Match the compounds with their respective properties:

    <p>F-CH2COOH = Strongest acid O2N-CH2COOH = Second strongest acid HCOOH = Weakest acid CH3COOH = Moderate acid</p> Signup and view all the answers

    Which of the following treatments would yield the compound formed from hydrogenation of benzoyl chloride?

    <p>Pd/BaSO4</p> Signup and view all the answers

    What type of test can distinguish propanal from propanone?

    <p>Iodoform test</p> Signup and view all the answers

    CH3CHO is more reactive than CH3COCH3 towards reaction with HCN.

    <p>True</p> Signup and view all the answers

    Which compound is not identified by the iodoform test?

    <p>Pentan-3-one</p> Signup and view all the answers

    Chloroacetic acid is less acidic than acetic acid.

    <p>False</p> Signup and view all the answers

    What is the IUPAC name of Salicylic acid?

    <p>2-hydroxybenzoic acid</p> Signup and view all the answers

    The product formed when (CH3)3C-CHO reacts with zinc amalgam and dilute hydrochloric acid is __________.

    <p>3-pentanone</p> Signup and view all the answers

    Match the compounds with their corresponding reactions:

    <p>Propanone = 1. Treated with methylmagnesium iodide and hydrolyzed Benzene = 2. Treated with CH3COCl and AlCl3 Benzoyl chloride = 3. Converted to benzaldehyde Propanol = 4. Converted to 2-Bromopropanoic acid</p> Signup and view all the answers

    What happens when benzene is treated with CH3COCl in the presence of anhydrous AlCl3?

    <p>Electrophilic substitution to form acetophenone</p> Signup and view all the answers

    What is the correct formula for calculating osmotic pressure?

    <p>$ ext{Osmotic Pressure} = iCRT$</p> Signup and view all the answers

    The carbonyl carbon of ketones is less electrophilic than that of aldehydes.

    <p>True</p> Signup and view all the answers

    The molar mass of a substance can be calculated using freezing point depression.

    <p>True</p> Signup and view all the answers

    What is the molar mass of the protein if the osmotic pressure is 13.3 mm Hg?

    <p>13980.45 g mol-1</p> Signup and view all the answers

    Identify the organic compound 'A' that has the molecular formula C5H10O, gives a negative Tollens' test, and forms n-pentane on Clemmensen reduction.

    <p>3-pentanone</p> Signup and view all the answers

    The _____ law describes the relationship between the partial pressure of a gas and its concentration in a liquid.

    <p>Henry's</p> Signup and view all the answers

    Match the following concepts with their definitions:

    <p>Colligative properties = Properties that depend on the number of solute particles in a solution. Molality = The number of moles of solute per kilogram of solvent. Osmosis = Movement of solvent molecules through a semipermeable membrane. Molarity = The number of moles of solute per liter of solution.</p> Signup and view all the answers

    Which of the following statements about molarity is true?

    <p>Molarity is the number of moles per liter of total solution.</p> Signup and view all the answers

    What mass of NaCl must be dissolved to lower the freezing point by 7.5°C in 65g of water?

    <p>8.199 g</p> Signup and view all the answers

    The mass of ethylene glycol that must be added to lower the freezing point from 0°C to -10°C in 5.50 Kg of water is _____ kg.

    <p>1.833</p> Signup and view all the answers

    Which of the following compounds can produce a foul smell of isocyanide when treated with chloroform and ethanolic NaOH?

    <p>Propylamine</p> Signup and view all the answers

    Aniline can undergo Friedel-Crafts reactions.

    <p>False</p> Signup and view all the answers

    What is the IUPAC name of the product formed when methyl amine reacts with benzoyl chloride?

    <p>N-Methylbenzamide</p> Signup and view all the answers

    The strongest base among the following in an aqueous solution is _____

    <p>ethylamine</p> Signup and view all the answers

    Match the following amines with their respective boiling points:

    <p>Ammonia = Lowest boiling point Methylamine = Higher boiling point than ammonia Ethylamine = Higher boiling point than methylamine Aniline = Highest boiling point</p> Signup and view all the answers

    Which of the following best describes the effect of electron withdrawing groups on aromatic amines?

    <p>Decrease basicity</p> Signup and view all the answers

    Which of the following statements is true about carboxylic acids?

    <p>They do not give reactions typical of carbonyl groups.</p> Signup and view all the answers

    Ammonolysis of alkyl halides is an effective method for preparing pure primary amines.

    <p>False</p> Signup and view all the answers

    What is the increasing order of pKb values for (C2H5)2NH, C2H5NH2, NH3, and C6H5NH2?

    <p>(C2H5)2NH &lt; C2H5NH2 &lt; NH3 &lt; C6H5NH2</p> Signup and view all the answers

    Isomer B of C3H7O can give a yellow precipitate of iodoform when reacting with NaOH and I2.

    <p>True</p> Signup and view all the answers

    What is the reaction involved in Wolff-Kishner reduction?

    <p>Reduction of ketones and aldehydes to alkanes using hydrazine and a strong base.</p> Signup and view all the answers

    Compound A (C3H7O) is _____ and Compound B (C3H7O) which gives iodoform test is _____.

    <p>propanal, propan-2-one</p> Signup and view all the answers

    Match the functional groups with their corresponding tests:

    <p>Butanal = Tollens' test Butan-2-one = Iodoform test Benzoic acid = Neutral red test Phenol = Ferric chloride test</p> Signup and view all the answers

    Which of the following statements correctly differentiates between butanal and butan-2-one?

    <p>Butanal gives a positive Tollens' test, but butan-2-one does not.</p> Signup and view all the answers

    Isomer C will give a positive Iodoform test.

    <p>False</p> Signup and view all the answers

    Which isomer out of A, B, and C is least reactive towards addition of HCN?

    <p>Isomer B</p> Signup and view all the answers

    Study Notes

    General Chemistry Study Notes

    • Chemistry is the study of matter, its properties, composition, behaviour, and the changes it undergoes.
    • Matter is anything that has mass and occupies space.
    • Elements are substances that cannot be broken down into simpler substances by chemical means.
    • Compounds are substances composed of two or more elements chemically combined in fixed proportions.
    • Mixtures are combinations of two or more substances that are not chemically combined.
    • Atoms are the basic building blocks of matter.
    • Molecules are groups of two or more atoms held together by chemical bonds.
    • Chemical reactions involve the rearrangement of atoms to form new substances.
    • Stoichiometry is the study of the quantitative relationships between reactants and products in a chemical reaction.
    • Thermodynamics deals with the energy changes that accompany chemical and physical processes.
    • Kinetics studies the rates of chemical reactions.
    • Equilibrium deals with systems in a state of dynamic equilibrium.
    • Acids are substances that release hydrogen ions (H⁺) in solution.
    • Bases are substances that release hydroxide ions (OH⁻) in solution.
    • Salts are ionic compounds formed from the reaction of an acid and a base.
    • Solutions are homogeneous mixtures of two or more substances.
    • Concentration expresses the amount of solute in a given amount of solvent or solution.

    Organic Chemistry Study Notes

    • Organic chemistry is the study of carbon-containing compounds.
    • Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.
    • Alkanes, alkenes, and alkynes are hydrocarbons with single, double, and triple bonds, respectively.
    • Alcohols, ethers, aldehydes, ketones, carboxylic acids, and amines are examples of organic functional groups.
    • Reactions involve breaking and forming bonds between atoms.
    • Mechanisms explain the step-by-step processes of reactions at the molecular level.

    Biochemistry Study Notes

    • Biochemistry is the study of chemical processes within and relating to living organisms.
    • Carbohydrates are important biomolecules that play a crucial role in energy storage, structure, and other biological functions.
    • Lipids are a diverse group of biomolecules that are crucial for energy storage, membrane structure, and signaling.
    • Proteins are large biomolecules crucial for a wide range of functions in living organisms.
    • Nucleic acids (DNA and RNA) store and transmit genetic information.
    • Enzymes are biological catalysts that accelerate biochemical reactions.

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    Description

    Test your knowledge on nucleophilic substitution reactions in organic chemistry. This quiz covers various concepts including the reactivity of compounds towards SN1 and SN2 mechanisms, product formation, and the effects of substituents on reactivity. Challenge yourself with questions about IUPAC naming, isomerism, and reactivity patterns.

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