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Chemistry 2015 JAMB Past Questions

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61

The oxidation state of sulphur on H2SO4 acid is

  • A. -4
  • B. +6
  • C. 4
  • D. -8
View Answer & Discuss (1) JAMB 2015
62
In the electrolysis of brine the anode is
  • A. platinum
  • B. copper
  • C. zinc
  • D. carbon
View Answer & Discuss (3) JAMB 2015
63
Calculate the relative molecular mass of Limestone CaCO3, (Ca = 40, C =12, O = 16)
  • A. 56
  • B. 100
  • C. 76
  • D. 90
View Answer & Discuss (4) JAMB 2015
WAEC offline past questions - with all answers and explanations in one app - Download for free
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
64

When steam is passed over red hot carbon the substances produced are

  • A. hydrogen and trioxocarbonate (IV) acid
  • B. hydrogen, oxygen and carbon (IV) oxide
  • C. hydrogen and carbon (ii) oxide
  • D. hydrogen and carbon (IV) oxide
View Answer & Discuss (2) JAMB 2015
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