Post Utme Chemistry Past Questions and Answers

Question 786:

An increase in the pressure of a gas results in decrease in its _____________

A. Mass
B. Vapor
C. Density
D. Temperature
E. Concentration

Question 787:

The loss of molecules of water crystallization to the atmosphere by some crystalline is known as ____________

A. Efflorescence
B. Effervescence
C. Phosphorescence
D. Florescence
E. Deliquescence

Question 788:

What is the percentage by weight of calcium by Ca(OCl)2?
(Ca=40, C=35.5, O=16)

A. 28%
B. 31.6%
C. 43.8%
D. 44.5%
E. 90.3%

Question 789:

Lead and tin are the components of ____________

A. Steel
B. Bronze
C. Brass
D. Dentists amalgam
E. Soft solder

Question 790:

If a solution has a pH of 2, it can be concluded that it ____________

A. Is a weak electrolyte
B. Has hydrogen ion concentration of 0.2 mol dm?
C. Is as twice as acidic as a solution of pH 1
D. Will produce effervescence with magnesium ribbon
E. Is neutral