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Chemistry 1994 JAMB Past Questions

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1
A mixture of sand, ammonium chloride and sodium chloride is best separated by?
  • A. sublimation followed by addition of water and filteration
  • B. sublimation followed by addition of water and evaporation
  • C. addition of water followed by filtration and sublimation
  • D. addition of water followed by crystallization and sublimation
View Answer & Discuss (3) JAMB 1994
2
A pure solid usually melts?
  • A. over a wide range of temperature
  • B. over a narrow range of temperature
  • C. at a lower temperature than the impure one
  • D. at the same temperature as the impure one
View Answer & Discuss (4) JAMB 1994
3
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 (1) JAMB 1994
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NECO offline past questions - All questions, answers & explanations in one app 25712
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
4

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 (12) JAMB 1994
5
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 (4) JAMB 1994
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts