Jamb Chemistry 2023 Past Questions and Answers

Question 6:

• JAMB 2023

Which transition metal is known for its multiple colorful oxidation states and compounds used in pigments and paints?

A. Silver (Ag)
B. Copper (Cu)
C. Gold (Au)
D. Zinc (Zn)

Question 7:

• JAMB 2023

Which of the following methods is commonly used to remove suspended impurities from water?

A. Fluoridation
B. Chlorination
C. Filtration
D. Distillation

Question 8:

• JAMB 2023

What is the valency of an element with the electronic configuration 2, 8, 7?

A. 7
B. 1
C. 2
D. 3

Question 9:

• JAMB 2023

When anhydrous cobalt chloride paper is exposed to water, what color change is observed?

A. From pink to blue
B. From white to blue
C. From blue to white
D. From blue to pink

Question 10:

• JAMB 2023

Which type of salt is found in antacid medications and is used to relieve heartburn and indigestion?

A. Aluminum chloride
B. Magnesium chloride
C. Sodium chloride
D. Calcium chloride