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Chemistry 2002 WAEC Past Questions

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16
Which of the following elements has a ground state electronic configuration with an incomplete penultimate shell?
  • A. Iron
  • B. Sodium
  • C. Aluminium
  • D. Calcium
View Answer & Discuss (1) WAEC 2002
17
The conclusion from Rutherford's alpha-scattering experiment is that
  • A. atoms are mostly empty space with a small nucleus
  • B. emissions from radioactive substances consist of three main components
  • C. there is nuclear pull on orbital electrons
  • D. electrons are deflected by both magnetic and electric fields
View Answer & Discuss WAEC 2002
18
An element Y has the electronic configuration 1s22s22p6623p4. To what period does it belong in the periodic table?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
View Answer & Discuss (8) WAEC 2002
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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19
If a metal R forms a compound with the formula R(NO3)2 , the formula of its tetraoxosulphate (IV) is
  • A. R(SO4)2
  • B. RSO4
  • C. R2SO4
  • D. R2(SO4)3
View Answer & Discuss (4) WAEC 2002
20
Which of the following decreases when a given mass of gas is compressed to half its initial volume?
  • A. Average intermolecular distance
  • B. Frequency of collisions
  • C. Number of molecules present
  • D. Atomic radius of each particle
View Answer & Discuss (2) WAEC 2002
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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
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