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Chemistry 2009 WAEC Past Questions

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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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6
Which of the following elements has the electronic configuration:1s22s22p63s23p1? [11Na, 13A1,
14N,16S]
  • A. Al
  • B. Na
  • C. N
  • D. S
View Answer & Discuss (3) WAEC 2009
7
The following properties are characteristics of transition elements except
  • A. formation of complex ions
  • B. fixed oxidation states
  • C. formation of coloured compounds
  • D. catalytic abilities
View Answer & Discuss WAEC 2009
8

Which of the following ions is isoelectronic with neon? [\(_3\)Li, \(_9\)F, \(_{10}\)Ne, \(_{17}\)CI,\(_{19}\)K ]

  • A. CI-
  • B. F-
  • C. K+
  • D. Li,+
View Answer & Discuss (6) WAEC 2009
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9
Which of the following electronic configurations correctly represents an element in period 3 of the periodic table?
  • A. 1s2 2s2 2p2
  • B. 1s2 2s2 2p6
  • C. 1s2 2s2 2p6 3s2 3p4
  • D. 1s2 2s2 2p6 3s2 3p6 4s1
View Answer & Discuss (3) WAEC 2009
10
An element Q forms a compound QCI5. In which group of the periodic table is Q?
  • A. l
  • B. lll
  • C. V
  • D. VII
View Answer & Discuss (2) WAEC 2009
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