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871
One mole of a hydrocarbon contains 48 g of carbon. If it vapour density is 28, the hydrocarbon is?
  • A. an alkane
  • B. an alkene
  • C. an alkyne
  • D. aromatic (C = 12, H = 1)
View Answer & Discuss (6) JAMB 1994
872
Which of the following reagents will confirm the presence of unsaturation in a compound?
  • A. Fehling's solution
  • B. Bromine water
  • C. Tollen's reagent
  • D. Benedict's solution
View Answer & Discuss (2) JAMB 1994
873

Chromatography is used to separate components of mixtures which differ in their rates of?

  • A. diffusion
  • B. migration
  • C. reaction
  • D. sedimentaion
View Answer & Discuss (12) JAMB 1995
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874
Which of the following is a example of a chemical change?
  • A. Dissoultion of salt in water
  • B. Rusting of iron
  • C. Melting of ice
  • D. Separating a mixture by distillation
View Answer & Discuss (2) JAMB 1995
875

The number of hydrogen ions in 4.9 g of tetraoxosulphate (IV) acid is?

(S = 32, O =16, H = 1, Avogadro Number = 6.02 x 10\(^{23}\) )

  • A. 3.01 x 1022
  • B. 6.02 x 1022
  • C. 3.01 x 1023
  • D. 6.01 x 1023
View Answer & Discuss (19) JAMB 1995
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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