Jamb Chemistry 2000 Past Questions and Answers

Question 16:

• JAMB 2000

The noble gas, argon,is used for

A. Electric arc welding
B. Welding brass
C. Underwater welding
D. Steel welding

Question 17:

• JAMB 2000

A side effect of soft water is that

A. It gives offensive taste
B. Excess calcium is precipitated
C. It attcaks lead contained in pipes
D. It encourages the growth of bacteria

Question 18:

• JAMB 2000

Water molecule can be ligands especially when they are bonded to

A. Alkaline earth metals
B. Alkali metals
C. Transition metals
D. Group VII elements

Question 19:

• JAMB 2000

The air pollutant unknown in nature is

A. NO
B. CO
C. HCHO
D. DDT

Question 20:

• JAMB 2000

1.0 dm3 of distilled water was used to wash 2.0g of a precipitate of AgCl. If the solubility product of AgCl is 2.0 * 10-10mol2dm-6, what quantity of silver was lost in the process?

A. 2.029 * 10^-3mol dm^-3
B. 1.414 * 10^-3mol dm^-3
C. 2.029 * 10^-5mol dm^-3
D. 1.414 * 10^-5mol dm^-3