EXAMSHARE

Western Delta University, Oghara Delta State

department of basic and industrial chemistry
college of natural and applied sciences
western delta university

second semester examination 2022/2023 session

CHM102 - general chemistry II time: 2hrs: 30mins

answer FOUR questions only

  1. Question 1

    1. State and explain the method of preparing alkanes (7.5 marks)
    2. Using equations only, explain the following methods of preparing:
      1. Akenes and alkyne reduction (2.5 marks)
      2. Wurtz reaction (2.5 marks)
      3. Oxidation (2.5 marks)
      4. Reduction of alkyl halides (2.5 marks)

  2. Question 2

    1. States four (4) physical properties of alkane (4 marks)
    2. Give the structure of the following compounds:
      1. 1,2- dibromocyclopentane (1 marks)
      2. 3- heptanol (1 marks)
      3. 2,3,4- trihydroxybutanal (1 marks)
      4. 2,3- pentadiene (1 marks)
      5. 1, 1, 2, 2- tetra bromo butane (1 marks)
      6. 2,2,4- timethyl hexane (1 marks)
      7. cyclobutane (1 marks)
      8. cyclohexene (1 marks)
      9. toluene (1 marks)
      10. aniline (1 marks)
    3. Describe any test for alkene (3.5 marks)

  3. Question 3

    1. Explain using equation only the following reactions of alkenes:
      1. Addition of hydrogen halides (2.5 marks)
      2. Reduction (2.5 marks)
      3. Halogenation (2.5 marks)
      4. Hydroxylation of alkenes (2.5 marks)
      5. Ozonolysis (2.5 marks)
    2. Explaing the following properties of alkynes:
      1. Combustion (4 marks)
      2. Addition of hydrogen (3.5 marks)

  4. Question 4

    1. What are carbonyl compounds? (3 marks)
    2. Draw the structure of the following:
      1. Ethanol (2 marks)
      2. Butan-3-one (2 marks)
      3. Propanoic acid (2 marks)
    3. With a named example each give the classes and types of alcohol (3 marks)
    4. Write a reaction for the oxidation of ethanol to ethanoic acid (2.5 marks)
    5. With equation only, give any three reactions of alcohol (3 marks)

  5. Question 5

    1. Draw the structure of 3-methylbutan-1,2-diol (3 marks)
    2. What are esters? (3 marks)
    3. Write a reaction for the formation of ethyl ethanoate (3.5 marks)
      1. State two differences between a sigma and a pi bond (5 marks)
      2. State five (5) characteristics of lipids (3 marks)

  6. Question 6

    1. Draw the structures of the following compound:
      1. Prostaglandis (4 marks)
      2. B-carotene (4 marks)
      3. Cetyl palmitate (4 marks)
      4. Phospholipids (4 marks)
    2. Name the following compound: (1.5 marks)