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Chemistry WAEC Past Questions

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531
Which of the following compounds can be represented by the molecular formula C2H6O?
  • A. Propanel
  • B. Ethanol
  • C. Methanoic acid
  • D. Glucose
View Answer & Discuss (2) WAEC 2002
532

When alkynes are hydrogenated completely, they produce compounds with the general molecular formula

  • A. C nH n
  • B. C nH 2n+2
  • C. CnH 2n
  • D. CnH2n-2
View Answer & Discuss (13) WAEC 2002
533
The following compounds are hydrocarbons except
  • A. methylpropanoate
  • B. 2-methylbutane
  • C. benzene
  • D. cyclohexane
View Answer & Discuss (1) WAEC 2002
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534
Which of the following statements about soapless detergents is correct? They
  • A. lather readily with hard water
  • B. increase the surface tension of water
  • C. cause hydrolysis of salts in water
  • D. from a curdy precipitate with soft water
View Answer & Discuss WAEC 2002
535

The electronic configuration of an element is 1\(s^2\) 2\(s^2\) 2\(p^6\) 3\(s^2\) 3\(p^3\). Where is the element located in the periodic table?

  • A. Group lll, period 3
  • B. Group lll, period 5
  • C. Group V, period 3
  • D. Group V, period 5
View Answer & Discuss (7) WAEC 2003
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