Post Utme Chemistry Past Questions and Answers

Question 1116:

Which of these has the lowest \(pH\) value?

A. Calcium trioxocarbonates
B. Sodium trioxocarbonate (IV)
C. Hydrochloric acid
D. Ethanoic acid
E. Hydrocarbon acid

Question 1117:

Consecutive members of an alkane homogenous series differ by ____________

A. CH
B. \(CH _{2}\)
C. \(CH _{3}\)
D. \(C _{3} H _{3}\)
E. \(C _{ n } H _{ n +3}\)

Question 1118:

Which of these will dilute in \(HCl\) ? \(Mg , Fe , Pb\) and \(Cu\)

A. All the metals
B. \(Mg , Fe\) and Cu
C. Mg , Fe and \(Pb\)
D. \(Mg\) and \(Fe\) only
E. \(Mg\) only

Question 1119:

Which of the following is used in fire extinguishers?

A. Carbon (II) oxide
B. Carbon (IV) oxide
C. Sulphur (IV) oxide
D. Amonia
E. Sulphur (VI) oxide

Question 1120:

Metals is NOT used for under water construction because ____________

A. It hardens
B. Its hardening does not depend upon evaporation
C. It requires concrete to harden
D. It will be washed away by the flow of water
E. It softens when exposed.