Post Utme University of Uyo Chemistry Past Questions and Answers

Question 16:

For toluene crystals to sublime on heating, the molecules must acquire energy that is ____________

A. Less than the forces of attraction on the solid
B. Equal to the forces of attraction on the solid
C. Necessary to melt the solid
D. Greater than the forces of attraction on both the solid and the liquid phase

Question 17:

Two atoms represented as 215 98U and 208 98 U are ____________

A. Isomers
B. Allotropes
C. Isotopes
D. Anomers

Question 18:

As the difference in electro-negativity between bonded increases polarity of the bond ____________

A. Decreases
B. Increases
C. Remains unchanged
D. Reduces to zero

Question 19:

A student prepared 0.5M solution each of hydrochloric and ethanoic acid and then measured their pH.
The result will show that the ____________

A. PH values are equal
B. HCL solution has the higher PH
C. Sum of the pH values is 0.1
D. Ethanol acid has a higher PH

Question 20:

When platinum electrodes are used during the electrolysis of copper (II) tetraoxosulphate (VI) solution.
The solution becomes ____________

A. Acidic
B. Basic
C. Neutral
D. Amphoteric