University of Nigeria Chemistry Post Utme Past Questions and Answers

Question 16 :

Which of the following gases has characteristic pungent smell, turns red litmus paper blue and forms dense white fumes with hydrogen chloride gas

A. \(\mathrm{N}_{2}\)
B. \(\mathrm{N}_{2} \mathrm{O}\)
C. \(\mathrm{Cl}_{2}\)
D. \(\mathrm{NH}_{3}\)

Question 17 :

One of the most commonly determined chemical parameters of water quality is ____________

A. Temperature
B. Suspended solids
C. Biochemical oxygen demand
D. Turbidity