Jamb Chemistry 2002 Past Questions and Answers

Question 16:

• JAMB 2002

Tetraoxosulphate (VI) acid burns the skin by

A. Hydrolysis
B. Hydration
C. Heating
D. Dehydration

Question 17:

• JAMB 2002

When a salt loses its water of crystallization to the atmosphere on exposure, the process is said to be

A. Efflorescence
B. Deliquescence
C. Effervescence
D. Fluorescence

Question 18:

• JAMB 2002

Three drops of a 1.0 mol dm^-3 solution of NaOH are added to 20 cm³ of a solution of pH 8.4. The pH of the resulting solution will be

A. Close to that of pure water
B. Unaltered
C. Greater than 8.4
D. Less than 8.4

Question 19:

• JAMB 2002

25cm³ of a 0.2 mol dm³ solution of Na₂CO₃ requires 20 cm³ of a solution of HCl for neutralization. The concentration of the HCl solution is

A. 0.5 mol dm³
B. 0.6 mol dm³
C. 0.2 mol dm³
D. 0.4 mol dm³

Question 20:

• JAMB 2002

The substance least considered as a source of environmental pollution is

A. Lead compounds
B. Organophosphorous compounds
C. Silicate minerals
D. Uranium