Jamb Chemistry 2009 Past Questions and Answers

Question 11:

• JAMB 2009

The type of bonding in {Cu(NH₃)₄}²⁺ is

A. Coordinate
B. Electrovalent
C. Metallic
D. Covalent

Question 12:

• JAMB 2009

The mixture of gases used in a photographer's flash tube is

A. Argon and krypton
B. Krypton and xenon
C. Helium and argon
D. Argon and xenon

Question 13:

• JAMB 2009

When sodium trioxocarbonate (IV) decahydrate loses its water of crystallization to the atmosphere, the process is

A. Deliquescence
B. Efflorescence
C. Hygroscopic
D. Effervesecence

Question 14:

• JAMB 2009

Water can be obtained as the only product during the

A. Combustion of hydrocarbons
B. Neutraliization of an acid by base
C. Combustion of hydrogen
D. Electrolysis of brine

Question 15:

• JAMB 2009

If 10.5g of lead (II) trioxonitrate (V) is dissolved in 20cm³ of distilled water at 18^oC, the solubility of the solute in mol dm^-3 is
[Pb = 207, N = 14, O = 16]

A. 1.60
B. 5.25
C. 16.00
D. 525.00