Carboxylic acids and their derivatives

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Questions and Answers

What is the order of reactivity of alcohols towards RCOONa in esterification?

  • sec-alcohol > pri-alcohol > tert-alcohol > methyl alcohol
  • tert-alcohol > sec-alcohol > pri-alcohol > methyl alcohol (correct)
  • pri-alcohol > sec-alcohol > tert-alcohol > methyl alcohol
  • methyl alcohol > pri-alcohol > sec-alcohol > tert-alcohol

What is the role of acidic strength of carboxylic acid in esterification?

  • It increases the reaction rate
  • It plays a major role in determining the reaction rate
  • It has no effect on the reaction rate
  • It plays a minor role in determining the reaction rate (correct)

What is the product formed when silver acetate reacts with bromine in the Hunsdiecker reaction?

  • Silver bromide
  • Methyl acetate
  • Acetic anhydride
  • Methyl bromide (correct)

What is the reaction called when methanol is taken in place of ethanol in esterification?

<p>Trans esterification (D)</p> Signup and view all the answers

What is the product formed when a carboxylic acid reacts with ammonia to form an amide?

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

What is the product formed when a carboxylic acid reacts with a metal to form a salt and hydrogen?

<p>Alkane (A)</p> Signup and view all the answers

What is the product formed when Acetyl chloride reacts with Salicylic acid?

<p>Aspirin (D)</p> Signup and view all the answers

What is the product formed when Acetyl chloride reacts with ammonia?

<p>Acetamide (C)</p> Signup and view all the answers

What is the reaction called when Acetyl chloride reacts with hydrogen in the presence of a catalyst to form Acetaldehyde?

<p>Rosenmund reaction (C)</p> Signup and view all the answers

What is the product formed when Acetyl chloride reacts with diethyl ether?

<p>Ethyl acetate (D)</p> Signup and view all the answers

What happens when Acetyl chloride reacts with amines?

<p>Form substituted amides (D)</p> Signup and view all the answers

What is the product formed when Acetyl chloride reacts with potassium cyanide?

<p>Acetophenone (D)</p> Signup and view all the answers

What is the reaction of ester with alkalies known as?

<p>Saponification (A)</p> Signup and view all the answers

Which of the following is a characteristic of acid hydrolysis of esters?

<p>It is reversible (D)</p> Signup and view all the answers

What is the product formed when ethyl acetate reacts with ammonia?

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

What is the catalyst commonly used in the catalytic hydrogenation of esters?

<p>Copper chromate (C)</p> Signup and view all the answers

What is the reaction known as when a metal (Na) is used to reduce an ester in the presence of an alcohol?

<p>Bouveault-Blanc reduction (C)</p> Signup and view all the answers

What is the product formed when ethyl acetate is reduced using LiAlH4?

<p>Ethyl alcohol (A)</p> Signup and view all the answers

What is the result of inductive effect on the reactivity of acyl derivatives?

<p>Decreases the reactivity due to -I effect (C)</p> Signup and view all the answers

What is the product formed when phthalic acid reacts with ammonia?

<p>Phthalic amide (C)</p> Signup and view all the answers

Which method of preparation of acyl halides involves the reaction of carboxylic acid with PCl5?

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

What is the general structure of acyl halides?

<p>R-C-X (A)</p> Signup and view all the answers

What type of reactions are acyl derivatives characterised by?

<p>Nucleophilic substitution (A)</p> Signup and view all the answers

What is the use of phthalic anhydride in the industry?

<p>Manufacture of plastics and dyes (B)</p> Signup and view all the answers

What is the major reason for the lower boiling points of acyl chlorides compared to their parent acids?

<p>They are unable to form intermolecular hydrogen bonds (C)</p> Signup and view all the answers

Which of the following reactions is characterized by the formation of a hydrochloric acid byproduct?

<p>Hydrolysis of acyl chlorides (A)</p> Signup and view all the answers

What is the primary reason for the increased reactivity of acyl chlorides compared to esters and amides?

<p>They are less stabilized by resonance (A)</p> Signup and view all the answers

Which of the following reactions is NOT a characteristic of acyl chlorides?

<p>Halogenation to form alkyl halides (B)</p> Signup and view all the answers

What is the primary reason for the pungent and irritating odor of acyl chlorides?

<p>They are strong lachrymators (B)</p> Signup and view all the answers

Which of the following is a characteristic of acyl chlorides that is NOT true for their parent acids?

<p>They fume in air due to hydrolysis (C)</p> Signup and view all the answers

What is the product formed when acetic acid reacts with sodium hydroxide and heat?

<p>Sodium acetate and water (C)</p> Signup and view all the answers

What is the reaction known as when a carboxylic acid reacts with ammonia to form an amide?

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

What is the product formed when a carboxylic acid is reduced with hydrogen in the presence of a catalyst?

<p>An alcohol (B)</p> Signup and view all the answers

What is the reaction known as when a carboxylic acid reacts with Cl2 or Br2 in the presence of a small amount of red phosphorus?

<p>Hell-Volhard-Zelinsky reaction (D)</p> Signup and view all the answers

What is the product formed when a carboxylic acid is heated with sodium hydroxide and calcium oxide?

<p>A salt and water (D)</p> Signup and view all the answers

What is the product formed when acetyl chloride reacts with sodium hydroxide?

<p>Acetic acid and sodium chloride (A)</p> Signup and view all the answers

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