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Chemistry 2008 WAEC Past Questions

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6
Which of the following statements is not true of halogens?
  • A. they exist in different physical states
  • B. they exist as diatomic molecules
  • C. their ionic radii decrease down the group
  • D. their melting and bolling points increase down the group
View Answer & Discuss (1) WAEC 2008
7
Elements in the same group of the periodic table have
  • A. the same number of valence electrons
  • B. the same number of electron shells
  • C. different chemical behaviour
  • D. the same atomic size
View Answer & Discuss WAEC 2008
8
Consider the following elements and their electronic configurations
W: 1s22s2
X: 1s 22s22p6
Y: 1s22s22p63s2
Z: 1s22s22p63s23p2. Which of the elements belong to the same group in the periodic table?
  • A. W and X only
  • B. Y and Z only
  • C. W and Y only
  • D. W, Y and Z only
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9
Arrange the following elements in order of increasing electron affinity: Br2CI2
I 2
F 2
  • A. I 2CI2Br2F 2
  • B. I 2Br2CI2F 2
  • C. CI2 I 2Br2F 2
  • D. Br2CI2 I 2 F 2
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10
Water molecules are held together by
  • A. covalent bond
  • B. hydrogen bond
  • C. ionic forces
  • D. van der Waals forces
View Answer & Discuss (1) WAEC 2008
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