Jamb Chemistry 2023 Past Questions and Answers

Question 61:

• JAMB 2023

Which of the following factors does NOT affect the rate of a chemical reaction?

A. Concentration of reactants
B. Presence of a catalyst
C. Molecular weight of products
D. Temperature

Question 62:

• JAMB 2023

Which organic compound is responsible for the characteristic aroma of fruits?

A. Alkane
B. Alkyne
C. Ester
D. Amine

Question 63:

• JAMB 2023

What is the molar mass of water (H2O)?

A. 18 g/mol
B. 22 g/mol
C. 16 g/mol
D. 12 g/mol

Question 64:

• JAMB 2023

What is the chemical formula of rust, which is formed on the surface of iron in the presence of oxygen and moisture?

A. Fe\(_3\)O\(_4\)
B. FeO
C. Fe(OH)3
D. Fe\(_2\)O\(_3\)

Question 65:

• JAMB 2023

How many pi (\(\pi\)) bonds are there in an alkene with six carbon atoms?

A. 4
B. 6
C. 5
D. 3