Post Utme Chemistry Past Questions and Answers

Question 961:

An ideal gas changing volume as temperature rises can be represented by the diagram below:
The point marked \(X\) on the graph is ____________

A. \(-273 K\)
B. \(273 K\)
C. \(273^{\circ} C\)
D. \(-100 K\)

Question 962:

\(150 cm ^{3}\) of nitrogen Il oxide were sparked with \(100 cm ^{3}\) of oxygen, what volume of nitrogen IV oxide will be produced at s.t.p.?

A. \(100 cm ^{3}\)
B. \(75 cm ^{3}\)
C. \(50 cm ^{3}\)
D. \(150 cm ^{2}\)

Question 963:

What is the \(pH\) of \(2.5 \times 10^{-3} moldm ^{-3}\) barium hydroxide solution?

A. 11.5
B. \(11.6\)
C. \(11.7\)
D. \(11.8\)

Question 964:

When \(CuSO _{4}\) solution is treated with ammonia solution drop by drop till it is added in excess, a precipitate is firs! formed which then dissolves in excess to give a decp blue solution. The deep blue solution is ____________

A. \(Cu ( OH )_{2} \)
B. \(\left[ Cu \left( NH _{3}\right)_{4}\right]( OH )_{2} \)
C. \(CuSO _{4}\)
D. \(\left[ Cu \left( NH _{3}\right)_{2}\right] SO _{4}\)

Question 965:

Which of these clements has the highest first ionization energy?

A. Rb
B. Li
C. Na
D. K