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Chemistry 2023 JAMB Past Questions

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61

Which functional group is present in alkanals?

  • A. Carbonyl group (C=O)
  • B. Hydroxyl group (-OH)
  • C. Alkyl group (-R)
  • D. Carboxyl group (-COOH)
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62

At 2.0 atm pressure, the volume of a gas is 4.0 L. If the pressure is reduced to 1.0 atm while keeping the temperature constant, what will be the new volume of the gas?

  • A. 2.0 L
  • B. 6.0 L
  • C. 8.0 L
  • D. 4.0 L
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63

What is the main environmental concern associated with sulfur dioxide emissions?

  • A. Formation of acid rain
  • B. Global warming potential
  • C. Depletion of the stratospheric ozone
  • D. Depletion of the ozone layer
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64

Benzene can be converted to its derivative toluene by the addition of a methyl group. The reaction is an example of

  • A. Nucleophilic substitution
  • B. Elimination reaction
  • C. Electrophilic substitution
  • D. Addition reaction
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65

Why is water often referred to as the "universal solvent"?

  • A. Water is the most abundant substance on Earth
  • B. Water is essential for all living organisms.
  • C. Water is involved in many chemical reactions
  • D. Water can dissolve a wide variety of substances due to its polar nature
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