Post Utme University of Ibadan Chemistry Past Questions and Answers

Question 11:

One of these elements is the best reducing agent ____________

A. \(\mathrm{Pb}\)
B. \(\mathrm{Rb}\)
C. \(\mathrm{Al}\)
D. In
E. \(\mathrm{N}\)

Question 12:

The name of the gas driven off at the negative electrode during the electrolysis of brine is ____________

A. Hydrogen
B. Chlorine
C. Oxygen
D. Sodium
E. Hydrogen chloride

Question 13:

The oxidation state of \(\mathrm{P}\) in \(\mathrm{H}_{2} \mathrm{P}_{2} \mathrm{O}_{7}{ }^{2-}\) is ____________

A. -3
B. +3
C. +1
D. +5
E. -2

Question 14:

The oxidation state of \(\mathrm{S}\) in \(\mathrm{Ca}\left(\mathrm{HSO}_{3}
\right)_{2}\) is ____________

A. \(+2\)
B. \(-2\)
C. \(+4\)
D. \(-4\)
E. \(+6\)

Question 15:

The following substances are non-electrolytes except ____________

A. Chloroform
B. Sugar cane
C. Acetic \(\operatorname{acid}\)
D. \(\mathrm{NaCl}\)
E. C and D