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Chemistry JAMB Past Questions

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836
At the same temperature and pressure, 50 cm3 of nitrogen gas contains the same number of molecules as?
  • A. 25 cm3 of methane
  • B. 40 cm3 of hydrogen
  • C. 50 cm3 of ammonia
  • D. 100 cm3 of chlorine
View Answer & Discuss (3) JAMB 1994
837

8g CH4 occupies 11.2 dm3 at s.t.p. What volume would 22 g of CH3CH2CH3 occupy under the same condition?

(C = 12, H = 1)

  • A. 3.7 dm3
  • B. 11.2 dm3
  • C. 22.4 dm3
  • D. 33.6 dm3
View Answer & Discuss (15) JAMB 1994
838

To what temperature must a gas 273 K be heated in order to double both its volume and pressure?

  • A. 298 K
  • B. 546 K
  • C. 819 K
  • D. 1092 K
View Answer & Discuss (6) JAMB 1994
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839
For a gas, the relative molecular mass is equal to 2Y. What is Y?
  • A. The mas of the gas
  • B. The vapour density of the gas
  • C. The volume of the gas
  • D. The temperature of the gas
View Answer & Discuss (2) JAMB 1994
840
The densities of two gases, X and Y, are 0.5 g dm-3 and 2.0 dm-3 respectively.
What is the rate of diffusion of X relative to Y?
  • A. 0.1
  • B. 0.5
  • C. 2.0
  • D. 4.0
View Answer & Discuss (11) JAMB 1994
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