Alcohal, Phenol and Ether
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Questions and Answers

What is the main reason for the relatively low reactivity of ethers towards electrophilic substitution reactions?

  • The difficulty in forming a carbocation intermediate (correct)
  • The presence of a resonating methyl group
  • The high electronegativity of the oxygen atom
  • The steric hindrance caused by the methyl group

Which of the following is a product of the Friedel-Craft's reaction between anisole and methyl chloride?

  • Ortho-methyl anisole
  • p-Methoxy acetophenone
  • o-Methoxy acetophenone (correct)
  • Para-methyl anisole

What is the byproduct of the Pinacol-pinacolone rearrangement reaction?

  • Ethanol
  • Methanol
  • Water (correct)
  • Acetone

Which of the following is a correct order of acid strength?

<p>HCOOH &gt; CH3COOH &gt; (CH3)2CH – COOH &gt; (CH3)C – COOH (C)</p> Signup and view all the answers

What is the product of the nitration reaction of anisole?

<p>Methyl-2 nitrophenyl ether (D)</p> Signup and view all the answers

What type of reaction is favored when ethyl hydrogen sulphate is formed?

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

Which of the following reactions involves the cleavage of a carbon-oxygen bond?

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

What is the product of the reaction between anisole and bromine in the presence of a catalyst?

<p>Ortho and para bromo derivatives (B)</p> Signup and view all the answers

What is the byproduct of the reaction between phenyl ethyl ether and hydroiodic acid?

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

What is the role of conc. H2SO4 in the reaction with diethyl ether?

<p>It acts as a reactant (B)</p> Signup and view all the answers

Which of the following statements is true about compounds III, IV, and V?

<p>They show high electron density at ortho and para position (B)</p> Signup and view all the answers

What is the major product formed when CH3 and CH3Cl react with AlCl3?

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

Why do AlCl3 and phenol give poor yields in Friedel-Crafts reaction?

<p>Due to the formation of a complex between AlCl3 and phenol (B)</p> Signup and view all the answers

What is the by-product formed when phenol reacts with AlCl3?

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

What is the product formed when phenol reacts with acetyl chloride in the presence of AlCl3?

<p>o-Hydroxy acetophenone (C)</p> Signup and view all the answers

What is the product formed when phenol reacts with CO and NaOH in the presence of AlCl3?

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

What is the reaction known as when phenol reacts with liquid hydrogen cyanide and hydrochloric acid gas in the presence of AlCl3?

<p>Gattermann's reaction (A)</p> Signup and view all the answers

What is the product formed when a carbonyl compound is a ketone?

<p>3° alcohol (D)</p> Signup and view all the answers

What is the correct order of acidic nature of compounds?

<p>HOH &gt; ROH &gt; CH ≡ CH &gt; NH3 &gt; RH (C)</p> Signup and view all the answers

What is the effect of increasing alkyl groups on the –OH bonded carbon?

<p>Decreases the acidic nature of the alcohol (A)</p> Signup and view all the answers

What is the catalyst used in the oxo process?

<p>Cobalt carbonyl hydride (C)</p> Signup and view all the answers

What is the product of Meerwein-Ponndorff verley reduction?

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

What is the correct order of reactivity of alcohols towards C–O cleavage?

<p>Tertiary &gt; Secondary &gt; Primary (A)</p> Signup and view all the answers

What is the reason for the solubility of lower alcohols in water?

<p>Due to the hydrogen bonding between the OH group and water (C)</p> Signup and view all the answers

What is the product formed when an alkene undergoes hydroformylation?

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

What is the product formed when an ester undergoes alkaline hydrolysis?

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

What is the effect of increasing the size of the alkyl group on the solubility of alcohols in water?

<p>Decreases the solubility of alcohols in water (B)</p> Signup and view all the answers

What is the characteristic of monohydric alcohols?

<p>They are neutral (C)</p> Signup and view all the answers

What is the reason for the polar character of the OH group in alcohols?

<p>Due to the higher electronegativity of oxygen (C)</p> Signup and view all the answers

What is the product of oxidation of a 1° alcohol using Jones reagent?

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

What is the effect of MnO2 on allylic and benzylic alcohols?

<p>Oxidation to aldehyde (C)</p> Signup and view all the answers

What is the product of oxidation of a 2° alcohol using Jones reagent?

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

What is the product of catalytic oxidation of a 1° alcohol?

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

What is the reactivity order of alcohols towards oxidation?

<p>3° is resistant to oxidation (C)</p> Signup and view all the answers

What is the product of oxidation of a 3° alcohol using a strong oxidizing agent?

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

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