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Describe the reactions of chloroethane shown in the image.

Chemistry

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Here is a detailed breakdown of the synthetic route shown in the image:

I. Reactions starting from Chloroethane (CH3CH2Cl\text{CH}_3\text{CH}_2\text{Cl}):

  1. From Chloroethane (CH3CH2Cl\text{CH}_3\text{CH}_2\text{Cl}) to Ethane (CH3CH3\text{CH}_3\text{CH}_3)

    • Reagents: H2\text{H}_2 with a catalyst (e.g., Pt\text{Pt}, Pd\text{Pd}, or Ni\text{Ni})
    • Conditions: Heat (e.g., 150°C)
    • Reaction Type: Reduction (Hydrogenation/Hydrogenolysis)
    • Equation: CH3CH2Cl+H2→Ni/Pt/Pd, 150°CCH3CH3+HCl\text{CH}_3\text{CH}_2\text{Cl} + \text{H}_2 \xrightarrow{\text{Ni/Pt/Pd, 150°C}} \text{CH}_3\text{CH}_3 + \text{HCl}
  2. From Chloroethane (CH3CH2Cl\text{CH}_3\text{CH}_2\text{Cl}) to Ethene (CH2=CH2\text{CH}_2=\text{CH}_2)

    • Reagents: Alcoholic KOH
    • Conditions: Heat (reflux)
    • Reaction Type: Elimination (Dehydrohalogenation)
    • Equation: CH3CH2Cl+KOH (alc)→HeatCH2=CH2+KCl+H2O\text{CH}_3\text{CH}_2\text{Cl} + \text{KOH (alc)} \xrightarrow{\text{Heat}} \text{CH}_2=\text{CH}_2 + \text{KCl} + \text{H}_2\text{O}
  3. From Chloroethane (CH3CH2Cl\text{CH}_3\text{CH}_2\text{Cl}) to Ethanol (CH3CH2OH\text{CH}_3\text{CH}_2\text{OH})

    • Reagents: Aqueous KOH
    • Conditions: Heat (reflux)
    • Reaction Type: Nucleophilic Substitution
    • Equation: CH3CH2Cl+KOH (aq)→HeatCH3CH2OH+KCl\text{CH}_3\text{CH}_2\text{Cl} + \text{KOH (aq)} \xrightarrow{\text{Heat}} \text{CH}_3\text{CH}_2\text{OH} + \text{KCl}

    II. Reactions starting from Ethanol (CH3CH2OH\text{CH}_3\text{CH}_2\text{OH}):

  4. From Ethanol (CH3CH2OH\text{CH}_3\text{CH}_2\text{OH}) to Ethene (CH2=CH2\text{CH}_2=\text{CH}_2)

    • Reagents: Concentrated H2SO4\text{H}_2\text{SO}_4 or Al2O3\text{Al}_2\text{O}_3
    • Conditions: Heat (170°C for H2SO4\text{H}_2\text{SO}_4, 350°C for Al2O3\text{Al}_2\text{O}_3)
    • Reaction Type: Dehydration (Elimination)
    • Equation (using H2SO4\text{H}_2\text{SO}_4): CH3CH2OH→Conc. H2SO4,170°CCH2=CH2+H2O\text{CH}_3\text{CH}_2\text{OH} \xrightarrow{\text{Conc. H}_2\text{SO}_4, 170°C} \text{CH}_2=\text{CH}_2 + \text{H}_2\text{O}
  5. From Ethanol (CH3CH2OH\text{CH}_3\text{CH}_2\text{OH}) to Ethanoic Acid (CH3COOH\text{CH}_3\text{COOH})

    • Reagents: Acidified potassium permanganate (KMnO4/H+\text{KMnO}_4/\text{H}^+) or acidified potassium dichromate (K2Cr2O7/H+\text{K}_2\text{Cr}_2\text{O}_7/\text{H}^+)
    • Conditions: Heat (reflux)
    • Reaction Type: Oxidation
    • Equation (using KMnO4\text{KMnO}_4): CH3CH2OH+2[O]→KMnO4/H+,HeatCH3COOH+H2O\text{CH}_3\text{CH}_2\text{OH} + 2[\text{O}] \xrightarrow{\text{KMnO}_4/\text{H}^+, \text{Heat}} \text{CH}_3\text{COOH} + \text{H}_2\text{O}
  6. From Ethanol (CH3CH2OH\text{CH}_3\text{CH}_2\text{OH}) to Chloroethane (CH3CH2Cl\text{CH}_3\text{CH}_2\text{Cl})

    • Reagents: HCl (often with anhydrous ZnCl2\text{ZnCl}_2 as a catalyst, Lucas reagent) or PCl5\text{PCl}_5 or SOCl2\text{SOCl}_2
    • Conditions: Heat (if using HCl)
    • Reaction Type: Nucleophilic Substitution
    • Equation (using HCl): CH3CH2OH+HCl→HeatCH3CH2Cl+H2O\text{CH}_3\text{CH}_2\text{OH} + \text{HCl} \xrightarrow{\text{Heat}} \text{CH}_3\text{CH}_2\text{Cl} + \text{H}_2\text{O}

    III. Reactions starting from Ethene (CH2=CH2\text{CH}_2=\text{CH}_2):

  7. From Ethene (CH2=CH2\text{CH}_2=\text{CH}_2) to Chloroethane (CH3CH2Cl\text{CH}_3\text{CH}_2\text{Cl})

    • Reagents: HCl
    • Conditions: Room temperature
    • Reaction Type: Electrophilic Addition (Hydrohalogenation)
    • Equation: CH2=CH2+HCl→CH3CH2Cl\text{CH}_2=\text{CH}_2 + \text{HCl} \rightarrow \text{CH}_3\text{CH}_2\text{Cl}
  8. From Ethene (CH2=CH2\text{CH}_2=\text{CH}_2) to Ethanol (CH3CH2OH\text{CH}_3\text{CH}_2\text{OH})

    • Reagents: Steam (H2O\text{H}_2\text{O}) with an acid catalyst (e.g., H3PO4\text{H}_3\text{PO}_4)
    • Conditions: High temperature, high pressure
    • Reaction Type: Electrophilic Addition (Hydration)
    • Equation: CH2=CH2+H2O→H3PO4,Heat/PressureCH3CH2OH\text{CH}_2=\text{CH}_2 + \text{H}_2\text{O} \xrightarrow{\text{H}_3\text{PO}_4, \text{Heat/Pressure}} \text{CH}_3\text{CH}_2\text{OH}
  9. From Ethene (CH2=CH2\text{CH}_2=\text{CH}_2) to 1,2-Dichloroethane (CH2Cl−CH2Cl\text{CH}_2\text{Cl}-\text{CH}_2\text{Cl})

    • Reagents: Cl2\text{Cl}_2
    • Conditions: Room temperature, dark
    • Reaction Type: Electrophilic Addition (Halogenation)
    • Equation: CH2=CH2+Cl2→CH2Cl−CH2Cl\text{CH}_2=\text{CH}_2 + \text{Cl}_2 \rightarrow \text{CH}_2\text{Cl}-\text{CH}_2\text{Cl}
  10. From Ethene (CH2=CH2\text{CH}_2=\text{CH}_2) to Ethane-1,2-diol (CH2OH−CH2OH\text{CH}_2\text{OH}-\text{CH}_2\text{OH})

    • Reagents: Cold, dilute, alkaline KMnO4\text{KMnO}_4 (Baeyer's reagent)
    • Conditions: Cold, dilute, alkaline
    • Reaction Type: Oxidation (Dihydroxylation)
    • Equation: CH2=CH2+[O]+H2O→Cold, dil. KMnO4CH2OH−CH2OH\text{CH}_2=\text{CH}_2 + [\text{O}] + \text{H}_2\text{O} \xrightarrow{\text{Cold, dil. KMnO}_4} \text{CH}_2\text{OH}-\text{CH}_2\text{OH}

    IV. Additional Reactions/Sequences shown at the bottom:

  11. Sequence: Chloroethane (CH3CH2Cl\text{CH}_3\text{CH}_2\text{Cl}) to Ethanol (CH3CH2OH\text{CH}_3\text{CH}_2\text{OH}) to Ethene (CH2=CH2\text{CH}_2=\text{CH}_2)

    • Step 1: CH3CH2Cl→NaOHCH3CH2OH\text{CH}_3\text{CH}_2\text{Cl} \xrightarrow{\text{NaOH}} \text{CH}_3\text{CH}_2\text{OH}
      • Reagents: Aqueous NaOH
      • Conditions: Heat (reflux)
      • Reaction Type: Nucleophilic Substitution
      • Equation: CH3CH2Cl+NaOH (aq)→HeatCH3CH2OH+NaCl\text{CH}_3\text{CH}_2\text{Cl} + \text{NaOH (aq)} \xrightarrow{\text{Heat}} \text{CH}_3\text{CH}_2\text{OH} + \text{NaCl}
    • Step 2: CH3CH2OH→H2O/H+,warmCH2=CH2\text{CH}_3\text{CH}_2\text{OH} \xrightarrow{\text{H}_2\text{O}/\text{H}^+, \text{warm}} \text{CH}_2=\text{CH}_2
      • Note: The reagent H2O/H+\text{H}_2\text{O}/\text{H}^+ is typically for hydration of alkenes. For dehydration of alcohol to alkene, concentrated acid (e.g., H2SO4\text{H}_2\text{SO}_4) and heat are used. Assuming this refers to acid-catalyzed dehydration:
      • Reagents: Concentrated H2SO4\text{H}_2\text{SO}_4 (or Al2O3\text{Al}_2\text{O}_3)
      • Conditions: Heat (e.g., 170°C)
      • Reaction Type: Dehydration (Elim
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