Post Utme Biology Past Questions and Answers

Question 801:

Which of the following gases is colourless, odourless and soluble in potassium hydroxide solution.

A. \(NO_2\)
B. \(SO_2\)
C. \(NH_3\)
D. \(CO_3\)
E. \(SO\)

Question 802:

If a solution has a pH of 2, it can be concluded that it _____________

A. Is a weak electrolyte
B. Has hydrogen ion concentration of 0.2 mol dm?
C. Is as twice as acidic as a solution of pH 1
D. Will produce effervescence with magnesium ribbon
E. Is neutral

Question 803:

A finely divvied form of a metal burns more readily in air than the rod form because the rod has _____________

A. Higher molar mass
B. Smaller surface area
C. Protective oxide coating
D. Different chemical properties
E. Same chemical properties

Question 804:

In which of the following is the oxidation number of sulphur equal to -2?

A. Sa
B. H2S
C. SO2
D. SO;
E. SOs

Question 805:

How many orbitals associate with the Psub energy level?

A. 2
B. 3
C. 5
D. 6
E. 1