Post Utme Chemistry Past Questions and Answers

Question 431:

How much faster does a Helium atom travel than a nitrogen at the molecule same temperature?

A. \(1.68\)
B. \(1.70\)
C. 150
D. \(2.65\)
E. \(2.90\)

Question 432:

If a solution contains \(4.9 \mathrm{~g}\) of tetraoxosulphate (VI) acid, calculate the amount of copper (II) oxide that will meet with it

\((\mathrm{Cu}=64, \mathrm{O}=16, \mathrm{~S}=32, \mathrm{H}=1)\)

A. \(0.8 \mathrm{~g}\)
B. \(4.0 \mathrm{~g}\)
C. \(40.0 \mathrm{~g}\)
D. \(80.0 \mathrm{~g}\)

Question 433:

\(\mathrm{MnO}_{2}+\mathrm{xHCl}
ightarrow \mathrm{MnCl}_{2}+\mathrm{yH}_{2} \mathrm{O}\) \(+\mathrm{zCl}_{2}\)

In the reaction above, what are the values of \(x, y\) and \(z\) respectively.

A. \(2,1,2\)
B. \(4,1,2\)
C. \(4,2,1\)
D. 1, 2, 1

Question 434:

Tartaric acid is used industrially to ____________

A. Make baking powder
B. Make fruit juices
C. Remove rust
D. Dry substances

Question 435:

The carbon atoms in ethane are ____________ hybridized

A. \(S p^{4}\)
B. \(S p^{3}\)
C. \(S p^{5}\)
D. Sp