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Chemistry 1998 JAMB Past Questions

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6
30cm3 of hydrogen was collected over water at 27°C and 780 mm Hg. If the vapour pressure of water at the temperature of the experiment was 10 mm Hg, calculate the volume of the gas at 760 mm Hg and 7°C?
  • A. 40.0 cm3
  • B. 35.7 cm3
  • C. 28.4 cm3
  • D. 25.2 cm3
View Answer & Discuss (1) JAMB 1998
7
If sulphur (IV) oxide and methane are released simultaneously at the opposite ends of a narrow tube, the rates of diffusion Rso2 and Rch4 will be in the ratio?

(S = 32, O = 16, C = 12, H = 1)
  • A. 4:1
  • B. 2:1
  • C. 1:2
  • D. 1:4
View Answer & Discuss (17) JAMB 1998
8

A solid begins to melt when?

  • A. constituent particles acquires a greater kinetic energy
  • B. energy of vibration of particles of the solid is less than the intermolecular forces
  • C. constituent particles acquires energy above the average kinetic energy
  • D. energy of vibration of particles of the solid equals the intermolecular forces
View Answer & Discuss (21) JAMB 1998
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9
Which of the following electron configurations indicates an atom with the highest ionization energy?
  • A. 2,8,7
  • B. 2,8,8,1
  • C. 2,8,8,2
  • D. 2,8,8,7
View Answer & Discuss (17) JAMB 1998
10
The line observed in the sample hydrogen spectrum are due to emission of?
  • A. electrons from the atoms
  • B. energy by proton transition
  • C. energy by electron transition
  • D. neutron from the atom
View Answer & Discuss (6) JAMB 1998
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