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3391

The common feature of reactions at the anode is that

  • A. electrons are consumed
  • B. ions are reduced
  • C. oxidation is involved
  • D. the electrode dissolves
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3392

Consider the following reaction equation: \(2NO_{(g)} + O_{{2}{(g)}} \to 2NO_{{2}{(g)}}\). What is the change in the oxidation number of nitrogen?

  • A. +2 to 0
  • B. +2 to -2
  • C. +2 to +4
  • D. +4 to +2
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3393

Which of the following factors characterize members of the same homologous series?

  • A. The chemical property change gradually throughout the series
  • B. physical properties of members are similar
  • C. They have the same molecular formular
  • D. Successive members undergo changes in molecular formula by \(CH_{2}\)
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3394

Calculate the mass of copper deposited if a current of 0.45A flows through \(CuSO_{4}\) solution for 1hour 15mins.   [Cu=64.0, S= 32.0, O =16.0, 1F= 96500C]

  • A. 6.40g
  • B. 0.67g
  • C. 0.64g
  • D. 0.45g
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3395

Classification of alkanols is based on the 

  • A. number of carbon atoms present in the compound
  • B. molecular mass of the compound
  • C. molecular formula of the compound
  • D. number of alkyl groups bonded to the carbon having the hydroxyl group
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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
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Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208