Jamb Chemistry Past Questions For Year 2009
Question 6
The percentage of water of crystallization in ZnSO\(_4\).7H\(_2\)O is?
[Zn = 65, S = 32, O = 16, H = 1]
- A. 33%
- B. 44%
- C. 55%
- D. 87%
Question 7
Which of the following is a physical change?
- A. Freezing ice cream
- B. dissolving calcium in water
- C. burning kerosene
- D. Exposing white phosphorus to air
Question 8
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 9
The type of bonding in \({Cu(NH_3)_4}^2\)+ is?
- A. coordinate covalent
- B. electrovalent
- C. metallic
- D. covalent
Question 10
Which quantum number divides shells into orbitals?
- A. principal
- B. Arzimuthal
- C. Magnetic
- D. Spin
