Post Utme Chemistry Past Questions and Answers

Question 356:

The ionic radii of metals are usually ____________

A. Greater than their atomic radii.
B. Unaffected by the charge on the ion.
C. Less than their atomicradii
D. Breater than those of non-metals.

Question 357:

Which of the following compounds is not a raw material for the manufacture of plastics?

A. Ethene
B. Ethane
C. Monochloroethene
D. Propene

Question 358:

The energy required to remove the most loosely bound electron from an atom in the gaseous state is known as the ____________

A. Bondenergy
B. Ionizationenergy
C. Potentialenergy
D. Activationenergy

Question 359:

If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?

A. The reaction vessel gets hotter as the reaction proceeds.
B. \(\Delta\) H for the reaction is positive
C. The rate of reaction increases with time \(\quad\)
D. The activation energy of the reaction is high.

Question 360:

Which of the following pH values is likely to be that of a slightly alkaline solution?

A. 2
B. 5
C. .7
D. 8