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Chemistry Past Questions

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1

It is difficult to achieve an orderly arrangement of the molecules of a gas because they?

  • A. have no definite shape
  • B. have little force of attraction between them
  • C. can collide with one another in the container
  • D. are too small in size
View Answer & Discuss (17) JAMB 2004
2

Calculate the percentage by mass of nitrogen in calcium trioxonitrate (V)
[Ca = 40, N = 14, O = 16]

  • A. 8.5%
  • B. 13.1%
  • C. 17.1%
  • D. 27.6%
View Answer & Discuss (23) JAMB 2010
3

The IUPAC nomenclature of the compound LiAlH4 is?

  • A. lithiumtetrahydridoaluminate (III)
  • B. aluminium tetrahydrido lithium
  • C. tetrahydrido lithium aluminate (III)
  • D. lithium aluminium hydride
View Answer & Discuss (11) JAMB 2010
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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4

A solid begins to melt when?

  • A. constituent particles acquires a greater kinetic energy
  • B. energy of vibration of particles of the solid is less than the intermolecular forces
  • C. constituent particles acquires energy above the average kinetic energy
  • D. energy of vibration of particles of the solid equals the intermolecular forces
View Answer & Discuss (13) JAMB 1998
5

An element X has two isotopes, \(^{20} _{10}X\) and \(^{22} _{10}X\),
present in the ratio 1:3. The relative atomic mass of X would be?

  • A. 20.5
  • B. 21.0
  • C. 21.5
  • D. 22.0
  • E. 22.5
View Answer & Discuss (18) JAMB 1982
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208