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Chemistry 1990 JAMB Past Questions

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26
The volume occupies by 1.58g of a gas at s.t.p is 500cm3. What is the relative molecular mass of the gas?

(G.M.V at s.t.p = 22.40dm3)
  • A. 28
  • B. 32
  • C. 44
  • D. 71
View Answer & Discuss (9) JAMB 1990
27

Equal volumes of CO,SO2, NO2 and H2S were released into a room at the same point and time. Which of the following gives the order of diffusion of the gases to the opposite corner of the room?
(S = 32, C = 12, O = 16, N = 14, H = 1)

  • A. CO, SO2,NO2,H2S
  • B. SO2,NO2,H2S,CO
  • C. CO,H2S,SO2,NO2
  • D. CO,H2S,NO2,SO2
View Answer & Discuss (9) JAMB 1990
28
A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that?
  • A. collisions are perfectly elastic
  • B. forces of repulsion exist
  • C. forces of repulsion are in equilibrium
  • D. collision are inelastic
View Answer & Discuss (9) JAMB 1990
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29
.....................P....Q.....R......S
Proton..............13....16....17.....19
Electron............13....16....17.....19
Neutron.............14....16....35.....20

Which of the four atoms P,q,R and in S in the above data can be described by the following properties relative atomic mass is greater than 30 but less than 40; it has an odd atomic number and forms a unipositive ion in solution?
  • A. P
  • B. Q
  • C. R
  • D. S
View Answer & Discuss (6) JAMB 1990
30
Which of the following terms indicates the number of bonds that can be formed by an atom?
  • A. Oxidation number
  • B. Valence
  • C. Atomic number
  • D. Electronegativity
View Answer & Discuss (14) JAMB 1990
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