South Africa Matric · Physical Sciences

Electrochemistry and organic chemistry

14 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 14 questions

  1. What is the general formula of the alkane homologous series?
  2. What is the IUPAC name of the compound CH₃CH₂CH₂OH?
  3. Which functional group is present in a carboxylic acid?
  4. Ethanol reacts with ethanoic acid in the presence of concentrated sulphuric acid. The organic product is
  5. Which of the following describes a saturated hydrocarbon?
  6. How many structural isomers does butane (C₄H₁₀) have, including butane itself?
  7. The boiling points of the alkanes increase with increasing chain length because
  8. In a galvanic cell, oxidation takes place at the
  9. What is the function of the salt bridge in a galvanic cell?
  10. Which of the following is the strongest reducing agent according to the table of standard reduction potentials: Mg, Zn, Cu or Ag?
  11. A galvanic cell is made from a Zn|Zn²⁺ half-cell (-0.76 V) and a Cu|Cu²⁺ half-cell (+0.34 V), where Cu is the cathode. Calculate the standard emf of the cell.
  12. A galvanic cell is made from a Zn|Zn²⁺ half-cell (-0.76 V) and a Ag|Ag⁺ half-cell (+0.80 V), where Ag is the cathode. Calculate the standard emf of the cell.
  13. A galvanic cell is made from a Mg|Mg²⁺ half-cell (-2.36 V) and a Cu|Cu²⁺ half-cell (+0.34 V), where Cu is the cathode. Calculate the standard emf of the cell.
  14. A galvanic cell is made from a Cu|Cu²⁺ half-cell (+0.34 V) and a Ag|Ag⁺ half-cell (+0.80 V), where Ag is the cathode. Calculate the standard emf of the cell.

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