Jamb Chemistry 2023 Past Questions and Answers

Question 76:

• JAMB 2023

What is the symbol used to represent an alpha particle?

A. α
B. γ
C. δ
D. β

Question 77:

• JAMB 2023

When a substance is oxidized, it

A. Loses electrons
B. Gains oxygen atoms
C. Gains electrons
D. Loses protons (H+ ions)

Question 78:

• JAMB 2023

A blue litmus paper turns red when dipped into a solution. What does this indicate about the solution?

A. The solution is basic
B. The solution is neutral
C. The solution is acidic
D. The litmus paper is faulty

Question 79:

• JAMB 2023

Which of the following compounds is an example of an electrovalent bond?

A. NaCl (sodium chloride)
B. CO2 (carbon dioxide)
C. H2O (water)
D. CH4 (methane)

Question 80:

• JAMB 2023

If gas A has a molar mass of 32 g/mol and gas B has a molar mass of 64 g/mol, what is the ratio of their diffusion rates?

A. 2:1
B. 1:2
C. 1:1
D. 1:4