23 Organic Reactions MCQ3
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Questions and Answers

What is the type of reaction involved in the addition of Br₂, Cl₂, or HCl across C=C in ethene?

  • Elimination reaction
  • Substitution reaction
  • Addition reaction (correct)
  • Redox reaction

What is the catalyst used in the hydrogenation of ethene?

  • Palladium
  • Ni (correct)
  • Sodium
  • Copper

What is the product formed in the reaction of a carboxylic acid with an alcohol?

  • Ester (correct)
  • Ketone
  • Acid anhydride
  • Aldehyde

What is the type of reaction involved in the removal of a small molecule from a large molecule, leaving a C=C behind?

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

What is the type of reaction involved in the oxidation of a primary alcohol to a carboxylic acid?

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

What is the effect of the inductive effect on the O-H bond in an esterification reaction?

<p>It weakens the O-H bond (A)</p> Signup and view all the answers

What is the definition of hydrolysis?

<p>The decomposition of a substance by water (C)</p> Signup and view all the answers

What is the characteristic of the carbon attached to the OH group in secondary alcohols?

<p>Attached to 2 other carbons (D)</p> Signup and view all the answers

What is the role of UV light in the free radical substitution reaction?

<p>To initiate the reaction (B)</p> Signup and view all the answers

What is the result of the heterolytic fission of Br₂ in the halogenation of alkenes?

<p>Br⁺ and Br⁻ are formed (B)</p> Signup and view all the answers

What is the characteristic of the free radical Cl in the propagation step of the free radical substitution reaction?

<p>It has an unpaired electron (B)</p> Signup and view all the answers

What is the product of the reaction between a methyl radical and a Cl₂ molecule in the free radical substitution reaction?

<p>Chloromethane and a Cl radical (C)</p> Signup and view all the answers

What is the type of bond formed when Br⁺ gains an electron from the double bonded C’s in the halogenation of alkenes?

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

What is the driving force behind the attack of Br⁺ on the C=C in the halogenation of alkenes?

<p>To gain an electron (B)</p> Signup and view all the answers
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