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Chemistry 2003 WAEC Past Questions

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21
Determine the amount of electrons needed to deposit 6.4g of copper during the electrolysis of copper (ll) tetraoxosulphate (IV) solution [Cu = 64]
  • A. 0.10 mole
  • B. 0.20 mole
  • C. 1.0 mole
  • D. 2.0 mole
View Answer & Discuss (7) WAEC 2003
22
A given fuel has an octane number of 100. This means that
  • A. the knocking tendency of the fuel is low
  • B. the fuel is a mixture of several hydrocarbons
  • C. a large amount of alkanes is present in the fuel
  • D. the fuel needs to be cracked before use
View Answer & Discuss WAEC 2003
23
The equation for the reaction at the anode during the electrolysis of concentrated sodium chloride solution is
  • A. 2CI- (aq) → CI,sub>2(g) + 2e-
  • B. 40H-(aq) → 2H2O(I) + O2(g) + 4e -
  • C. Na+(aq) + e- → Na(s)
  • D. 2H+(aq) + 2e- → H2(g)
View Answer & Discuss (1) WAEC 2003
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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24
Which of the following compounds has the same empirical formula as benzene?
  • A. C2H2
  • B. C2H4
  • C. C4H6
  • D. C6H12
View Answer & Discuss WAEC 2003
25
A given fuel has an octane number of 100. This means that
  • A. the knocking tendency of the fuel is low
  • B. the fuel is a mixture of several hydrocarbons
  • C. a large amount of alkanes is present in the fuel
  • D. the fuel needs to be cracked before use
View Answer & Discuss (2) WAEC 2003
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Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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