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Quiz Chapter 2: Carbon Compound

10 questions · Form 5 Chemistry Bab 2: Carbon Compound

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Ethanol can be produced naturally by yeast through which process?

  1. Oxidation
  2. Cracking
  3. Fermentation
  4. Polymerisation
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Answer: C

Yeast ferments glucose in anaerobic conditions at ~37°C to produce ethanol and carbon dioxide.

2. What gas is produced when ethanoic acid reacts with calcium carbonate?

  1. Hydrogen gas
  2. Oxygen gas
  3. Carbon dioxide gas
  4. Sulfur dioxide gas
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Answer: C

Carboxylic acids react with metal carbonates to produce a salt, water, and carbon dioxide gas (CO₂).

3. How many double bonds are present in a molecule of propene?

  1. 1
  2. 2
  3. 3
  4. 0
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Answer: A

Propene (C₃H₆) is a simple mono-alkene containing exactly one C=C double bond.

4. Which compound is an isomer of butane (C₄H₁₀)?

  1. Methylpropane
  2. Methylpropene
  3. Cyclobutane
  4. Dimethylethane
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Answer: A

Butane (C₄H₁₀) has two structural isomers: unbranched butane and branched 2-methylpropane (or methylpropane).

5. What catalyst is required to convert vegetable oil (unsaturated) into margarine (saturated)?

  1. Nickel (Ni)
  2. Iron (Fe)
  3. Vanadium(V) oxide
  4. Manganese(IV) oxide
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Answer: A

Hydrogenation of unsaturated oils to form solid saturated fats uses a Nickel catalyst at ~180°C.

6. What sweet fruity smelling product is formed when ethanoic acid reacts with ethanol in the presence of concentrated H₂SO₄?

  1. Ethyl ethanoate
  2. Methyl ethanoate
  3. Ethylethane
  4. Diethyl ether
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Answer: A

Ethanoic acid + Ethanol → Ethyl ethanoate + Water. This process is called esterification.

7. What type of reaction occurs when methane reacts with chlorine gas under ultraviolet light?

  1. Addition reaction
  2. Substitution reaction
  3. Esterification reaction
  4. Fermentation reaction
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Answer: B

Alkanes undergo free-radical substitution reactions with halogens in the presence of UV light.

8. Which compound turns damp blue litmus paper red and reacts with magnesium to produce hydrogen gas?

  1. Propanone
  2. Propanoic acid
  3. Propanol
  4. Ethyl propanoate
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Answer: B

Propanoic acid is a carboxylic acid, displaying acidic properties by turning blue litmus red and liberating H₂ with magnesium.

9. What is the organic product formed when propanol undergoes dehydration using heated porcelain chips?

  1. Propane
  2. Propanoic acid
  3. Propene
  4. Ethyl propanoate
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Answer: C

Dehydration of an alcohol removes water to yield the corresponding alkene. Propanol dehydrates to propene.

10. Which of the following is a saturated hydrocarbon?

  1. Ethene
  2. Propynes
  3. Ethanol
  4. Butane
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Answer: D

Butane is an alkane containing only single carbon-carbon bonds, classifying it as a saturated hydrocarbon.

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