Post Utme Federal University of Technology, Akure Chemistry Past Questions and Answers

Question 1:

${\mathrm{Mg}}_{\mathrm{g}}+2{\mathrm{HCl}}_{\text{we }}{\mathrm{MgCl}}_{\text{ibes }}+{\mathrm{H}}_{\text{wat }}$ From the equation above, what mass of hydrogen would be produced if $12.0\mathrm{got}$ magnesium reacted completely with dilute hydrochloric acid? (H=1, Mg=24)

A. $1.0\mathrm{g}$
B. $2.0\mathrm{g}$
C. $6.0\mathrm{g}$
D. 12.0g

Question 2:

Alkanols have unexpectedly high boiling points relative to their molar masses because of intermolecular ____________

A. Hydrogen bonding.
B. Metallic bonding.
C. Covalent bonding.
D. Ionic bonding.

Question 3:

If an element $x$ with electronic configuration $2,8,3$, combines with another element $z$ with electronic configuration $2,8,6$, the compound formed will have the formula ____________

A. $XZ$.
B. $XZ,$
C. $X_{7}Z$
D. $X_2{Z}_3$

Question 4:

Which of the following molecules is linear in shape?

A. CH.
B. ${\mathrm{H}}_{3}0$
C. ${\mathrm{H}}_2\mathrm{S}$
D. Cl,

Question 5:

What is the percentage by mass of copper in copper (1) oxide $\left({\mathrm{Cu}}_2\mathrm{O}\right)?[0=16,\mathrm{Cu}=64]$

A. $88.9\mathrm{\%}$
B. $80.0\mathrm{\%}$
C. $66.7\mathrm{\%}$
D. $20.0\mathrm{\%}$