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Chemistry JAMB Past Questions

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1266
Which of the following fraction is used as raw material for the cracking process?
  • A. kerosine
  • B. lubricating oil
  • C. bitumen
  • D. diesel oils
View Answer & Discuss (7) JAMB 2013
1267
An organic compound contains 60% carbon, 13.3% hydrogen and 26.7% oxygen. Calculate the empirical formula
rn(C=12,H =1, O=16)
  • A. C 5H 12O
  • B. C 3H 8O
  • C. C 6H 13O 2
  • D. C 4H 9O
View Answer & Discuss (5) JAMB 2013
1268

Which of the following methods can be used to obtain pure water from a mixture of sand, water and methanoic acid?

  • A. netralization with NaOHfoolowed by filtration
  • B. neutralization with NaOH followed by distillation
  • C. fractional distillation
  • D. filtration followed by distillation
View Answer & Discuss (19) JAMB 2012
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1269
How many atoms are present in 6.0g of magnesium?
[Mg = 24, NA = 6.02 x 1023 mol-1]
  • A. 1.20 x 1022
  • B. 2.41 x 1022
  • C. 1.51 x 1023
  • D. 3.02 x 1023
View Answer & Discuss (8) JAMB 2012
1270

50 cm\(_3\) of gas was collected over water at 10ºC and 765 mm Hg. Calculate the volume of the gas at s.t.p. if the saturated vapour pressure of water at 10ºC is 5mm Hg

  • A. 49.19 cm 3
  • B. 48.87 cm 3
  • C. 48.55 cm 3
  • D. 48.23 cm 3
View Answer & Discuss (16) JAMB 2012
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