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Chemistry 2017 WAEC Past Questions

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41

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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42

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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43

The name of the compound \(C_{4}H_{9}COOC_{3}H_{7}\) is

  • A. propyl pentanoate
  • B. pentyl propanoate
  • C. butyl propanoate
  • D. propyl butanoate
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NECO offline past questions - All questions, answers & explanations in one app 25712
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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44

Which of the following pairs of gases are pollutants from car exhaust?

  • A. Nitrogen(II) oxide and Carbon(IV) oxide
  • B. Carbon(IV) oxide and Nitrogen
  • C. Carbon(II) oxide and Sulphur(IV) oxide
  • D. Carbon(II) oxide and oxygen
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45

Fats and oils can be obtained from any of the following sources except

  • A. paraffin oil
  • B. animals
  • C. groundnuts
  • D. palm kernel
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts