Post Utme Chemistry Past Questions and Answers

Question 691:

\begin{array}{|l|l|l|l|l|l|l|l|}
\hline O.I II III IV & V & VI & \multicolumn{1}{l|}{ VII } \\
\hline & \multicolumn{7}{|l|}{\(\mathrm{X}\) II } \\
\hline & & & \(\mathrm{X}\) & & & & \(\mathrm{Z}\) \\
\hline \(\mathrm{W}\) & & & & & & \(\mathrm{Y}\) & \\
\hline
\end{array}

The element that is likely to participate in covalent rather than ionic bonding is ____________

A. Z
B. Y
C. \(X\)
D. W

Question 692:

\begin{array}{|l|l|l|l|l|l|l|l|}
\hline O.I II III IV & V & VI & \multicolumn{1}{l|}{ VII } \\
\hline & \multicolumn{7}{|l|}{\(\mathrm{X}\) II } \\
\hline & & & \(\mathrm{X}\) & & & & \(\mathrm{Z}\) \\
\hline \(\mathrm{W}\) & & & & & & \(\mathrm{Y}\) & \\
\hline
\end{array}
The least reactive elements is ____________

A. W
B. X
C. Y
D. Z

Question 693:

\(1 S^{2} 2 S^{2} p^{3} S^{6} 3 d^{7} 4 S^{2}\).
An element with the electron configuration above is a ____________

A. Non -metal
B. Metal
C. Transition element
D. Group two element

Question 694:

\(0.25\) mole of hydrogen chloride was dissolved in dissolved in distilled water and the volume made up to \(0.50 \mathrm{dm}^{3}\). If \(15,00 \mathrm{~cm}^{2}\) of the solution sodium trioxocarbonate(iv) for neutralization calculate the concentration of the alkaline solution.

A. \(0.30\) mold \(m^{-3}\)
B. \(0.33\) mold \(m^{-3}\)
C. \(0.50 \mathrm{moldm}^{-3}\)
D. \(0.60 \mathrm{moldm}^{-3}\)

Question 695:

The correct order of increasing oxidation number of the transition metal lons for the compound \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}, \mathrm{~V}_{2}\) and \(\mathrm{KmnO}_{4}\) is ____________

A. \(\mathrm{V}_{2} \mathrm{O}_{5} \mathrm{~S}<\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}<\mathrm{KmnO}_{4}\)
B. \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}<\mathrm{KmnO}_{4}<\mathrm{V}_{2} \mathrm{O}_{5} \mathrm{~S}\)
C. \(<\mathrm{V}_{2} \mathrm{O}_{5} \mathrm{~S} \mathrm{KmnO}_{4}<\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\)