Jamb Chemistry 2023 Past Questions and Answers

Question 16:

• JAMB 2023

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

Question 17:

• JAMB 2023

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

Question 18:

• JAMB 2023

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

Question 19:

• JAMB 2023

Which of the following mixtures is an example of a colloid?

A. Milk
B. Orange juice
C. Saltwater
D. Sugar dissolved in water

Question 20:

• JAMB 2023

Which of the following substances is NOT hygroscopic?

A. Salt
B. Sugar
C. Silica gel
D. Aluminum