Post Utme Ebonyi State University Chemistry Past Questions and Answers

Question 1:

Which of the following roles does sodium chloride play in soap preparation?

A. Reacts with glycerol
B. Purifies the soap
C. Accelerates the decomposition of the fat and oil
D. Separates the soap from the glycerol
E. Converts the fat acid to its sodium salt

Question 2:

Which of the following is used as a moderator to control nuclear fission?

A. Lead
B. Heavy water
C. Iron
D. Chromium

Question 3:

One of the active components of baking powder is ____________

A. \(\mathrm{MgSO}_{4}\)
B. \(\mathrm{NaHCO}_{3}\)
C. \(\mathrm{CaSO}_{4}\)
D. \(\mathrm{NaCl}\)

Question 4:

\(\mathrm{H}_{2} \mathrm{SO}_{4}\) is used to remove rust on the surface of iron(pickling) before electroplating. The type of reaction involved is ____________

A. Redox reaction
B. Neutralization
C. Double decomposition
D. Hydrolysis

Question 5:

Silver chloride turns grey when exposed to sunlight because ____________

A. The silver ion is reduced to silver
B. The silver ion is oxidized to silver
C. Silver is a transition metal
D. The silver chloride forms complexes in the sun