Post Utme Chemistry Past Questions and Answers

Question 886:

The complex salt formed when aluminum dissolves in sodium hydroxide solution is ____________

A. \(Na _{3} Al ( OH )_{4}\)
B. \(Na _{2} Al ( OH )_{3}\)
C. \(NaAl ( OH )_{3}\)
D. \(Na _{4} Al ( OH )_{4}\)
E. \(\operatorname{NaAl}( OH )_{4}\)

Question 887:

Which of the following is a waste product in the solvay process for the manufacture of sodium trioxocarbonate (IV)?

A. Ammonium chloride
B. Brine
C. Limestone
D. Calcium oxide
E. Calcium oxide

Question 888:

Which of the following is not a naturally occurring Iron ore?

A. \(FeCl _{2}\)
B. \(Fe _{2} O _{3}\)
C. \(Fe _{2} O _{3}\)
D. \(FeCO _{3}
E. \(FeS _{2}\)

Question 889:

Which of the following materials cannot be extracted from its ore by using carbon or carbon (II) oxide as the reducing agent?

A. \(Cu\)
B. \(Zn\)
C. Al
D. \(Pb\)
E. \(Fe\)

Question 890:

Chlorine is used in water treatment as ____________

A. A germicide
B. A decolorizing agent
C. An anti-oxidant
D. A coagulating agent
E. An aerating agent