Post Utme Chemistry Past Questions and Answers

Question 306:

When naphthalene on heating changes from solid state directly to the gaseous state, it undergoes ____________

A. Sublimation
B. Evaporation
C. Combustion
D. Decomposition

Question 307:

Which of the following is an electrolyte?

A. Alcohol
B. Sodium ethanoate
C. Solid potassium hydroxide
D. Mercury

Question 308:

The equation \({ }_{7}^{14} N+{ }_{2}^{4} H e \rightarrow\)$${ }_{8}^{17} 0+\frac{1}{1} p$$

A. Nuclear fusion
B. Nuclear fission
C. Artificial radioactivity
D. Nuclear fission using positron

Question 309:

Which of the following is a general method of preparing acids?

A. Direct combination of constituent elements
B. Double decomposition involving a salt solution
C. Reaction between an anhydride and water
D. Reaction between a base and an amphoteric oxide

Question 310:

Natural water include the following except ____________

A. Rain water
B. Spring water
C. Pure water
D. Lake water