Jamb Chemistry 2023 Past Questions and Answers

Question 31:

• JAMB 2023

Which of the following statements is true regarding the melting and boiling points of pure substances?

A. The boiling point is always higher than the melting point
B. The melting point is always higher than the boiling point
C. The melting and boiling points are always the same for all substances
D. The melting and boiling points can vary depending on the substance

Question 32:

• JAMB 2023

An element has an atomic number of 8 and a mass number of 16. How many neutrons does this element have?

A. 24
B. 16
C. 8
D. 32

Question 33:

• JAMB 2023

Which of the following statements is true for strong electrolytes?

A. They do not conduct electricity in the molten state
B. They completely dissociate into ions in solution
C. They are non-polar substances
D. They partially dissociate into ions in solution

Question 34:

• JAMB 2023

What is the maximum number of electrons that can occupy the second energy level (n=2)?

A. 2 electrons
B. 18 electrons
C. 8 electrons
D. 32 electrons

Question 35:

• JAMB 2023

Which of the following is a common laboratory indicator for bases?

A. Methyl orange
B. Phenolphthalein
C. Bromothymol blue
D. Litmus