Post Utme Chemistry Past Questions and Answers

Question 236:

The bleaching action of chlorine gas is effective due to the presence of ____________

A. Oxygen
B. Hydrogen chloride
C. Water
D. Air

Question 237:

Which of the following pairs of substances will wet further with oxygen to form a higher oxide?

A. \(\mathrm{SO}_{2}\) and \(\mathrm{NO}\)
B. \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\)
C. \(\mathrm{CO}\) and \(\mathrm{CO}_{2}\)
D. \(\mathrm{NO}\) and \(\mathrm{H}_{2} \mathrm{O}\)

Question 238:

The salt formed between citric acid and sodium hydroxide in solution will be ____________

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

Question 239:

On exposure to the atmosphere, a hydrated salt loses its water of crystallization to become anhydrous. This phenomenon is referred to as ____________

A. Deliquescent
B. Hygroscopy
C. Hydrolysis
D. Efflorescence

Question 240:

Vulcanization involves the removal of ____________

A. A double bond
B. The single bond
C. A polymer
D. A monomer