46 8.7 Types of Organic Reactions

Practice questions

1. 1. 1. Classify the following organic reactions as addition, elimination and substitution.
         1. 1. [latex]\ce{CH_{3}CH_{2}CH=CH_{2} + H_{2} {\rightarrow} CH_{3}CH_{2}CH_{2}CH_{2}CH_{3}}[/latex]
            2. [latex]\ce{CH_{3}CH_{2}CH_{2}Cl + KOH {\rightarrow} CH_{3}CH_{2}CH_{2}OH + KCl}[/latex]
            3. [latex]\ce{CH_{3}CH_{2}CH_{2}OH + H_{2}SO_{4}/catalyst {\rightarrow} CH_{3}CH=CH_{2} + H_{2}O}[/latex]
      2. Predict the products of the following reaction: [latex]\ce{CH_{3}CH_{2}CH_{2}CH=CH_{2} + HBr {\rightarrow} ?}[/latex]. Select all the possible products. 
         1. 1. [latex]\ce{CH_{3}CHBr-CH_{2}CH_{2}CH_{3}}[/latex]
            2. [latex]\ce{CHBr-CH_{2}-CH_{2}-CH_{2}CH_{3}}[/latex]
            3. [latex]\ce{CH_{3}-CHBr-CHBr-CH_{2}-CH_{2}-CH_{3}}[/latex]
            4. [latex]\ce{CH_{3}CHBr-CHBr-CH_{2}CH_{3}}[/latex]

      3. Predict the reactants in the following reaction: the X reactant reacts with bromine to produce a chemical with the structure of a hexagon with 6 carbons 10 hydrogens, and two bromine atoms. Two bromine atoms are located at the first and second carbon of the hexagon: [latex]\ce{ X + Br_{2} {\rightarrow} C_{6}H_{10}Br_{2}}[/latex].

         1. 1. Hexagon with 6 carbons, 10 hydrogen and one carbon double bond.
            2. Hexagon with 6 carbons, 8 hydrogen and two carbon double bonds.
            3. Hexagon with 6 carbons, 6 hydrogen and three carbon double bonds, each present in alternative carbons.
      4. Classify the following organic reaction. [latex]\ce{CH_{3}-CH_{2}-COOH + CH_{3}-OH {\rightarrow} CH_{3}-CH_{2}-COO-CH_{2}-CH_{3} + H_{2}O}[/latex].
         1. 1. Hydrolysis
            2. Addition
            3. Reduction
            4. Condensation
      5. Classify the following organic reaction. [latex]\ce{CH_{3}-CH_{2}-CH_{2}-C(H)=O + H_{2}/Ni {\rightarrow} CH_{3}-CH_{2}-CH_{2}-CH_{2}-OH}[/latex].
         1. 1. Hydrolysis
            2. Reduction
            3. Condensation
            4. Oxidation
      6. Classify the following organic reaction. [latex]\ce{CH_{3}-CH{(CH_{3})}-COO-CH_{2}-CH_{3} + H^{+}/H_{2}O {\rightarrow} CH_{3}-CH{(CH_{3})}-COOH + CH_{3}CH_{2}-OH}[/latex]
         1. 1. Hydrolysis
            2. Addition
            3. Condensation
            4. Reduction
      7. Predict the products of the following oxidation reaction of alcohols with an oxidising agent. [latex]\ce{CH_{3}-CH_{2}-CH_{2}-C(OH)-CH_{3} {\rightarrow} [oxidation] ?}[/latex].
         1. 1. [latex]\ce{CH_{3}-CH_{2}-CH_{2}-C(=O)-CH_{3}}[/latex]
            2. [latex]CH_{3}-CH{(CH_{3})}-COOH[/latex]
            3. [latex]\ce{CH_{3}-CH_{2}-C(=O)-CH_{3}}[/latex]
      8. Predict the products of the following oxidation reaction of alcohols with an oxidising agent. [latex]\ce{CH_{3}-CH{(CH_{3})}-CH_{2}-OH {\rightarrow} [oxidation] ?}[/latex].
         1. 1. [latex]\ce{CH_{3}-CH_{2}-CH_{2}-CH_{2}-CH_{2}-Br}[/latex]
            2. [latex]\ce{CH_{3}-C{(CH_{3})}-COOH}[/latex]
            3. [latex]\ce{CH_{3}-CH_{2}-C(=O)-CH_{3}}[/latex]
      9. Predict the products of the following oxidation reaction of alcohols with an oxidising agent. [latex]\ce{CH_{3}-CH_{2}-CH(OH)-CH_{3} \{rightarrow} [oxidation] ?}[/latex]
         1. 1. [latex]\ce{CH_{3}-CH_{2}-CH_{2}-C(=O)-CH_{3}}[/latex]
            2. [latex]\ce{CH_{3}-CH{(CH_{3})}-COOH}[/latex]
            3. [latex]\ce{CH_{3}-CH_{2}-C(=O)-CH_{3}}[/latex]
      10. Which of the following statements is correct regarding the products of the above reaction? The structure description: Hexagon with six carbons and 10 hydrogens, and one of the carbons is substituted with a hydroxyl group and a methyl group. [latex]\ce{C_{6}H_{10}-OH{(CH_{3})} {\rightarrow} [oxidation]?}[/latex].
          1. 1. The above reaction produces a carboxylic acid.
             2. The above reaction produces a ketone.
             3. No reaction occurs.
             4. The above reaction produces an aldehyde.

Answers

1. 1. 1. Addition
      2. Substitution
      3. Elimination
2. a, b
3. a
4. d
5. b
6. a
7. a
8. b
9. c
10. c