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Chemistry WAEC Past Questions

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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971

The energy evolved when magnesium burns in air is in the form of

  • A. heat
  • B. heat and sound
  • C. light and heat
  • D. sound
View Answer & Discuss (1) WAEC 2012
972

A substance L reacts with NH\(_4\)NO\(_{3(aq)}\) to generate ammonia gas. L is likely to be

  • A. HCl
  • B. NaOH
  • C. CH3COOH
  • D. CaSO4
View Answer & Discuss (1) WAEC 2012
973

On heating, the following trioxocarbonate (IV) salts decompose to give solid residue except

  • A. ammonium trioxocarbonate (IV)
  • B. calcium trioxocarbonate (IV)
  • C. lead (ll) trioxocarbonate(IV)
  • D. zinc trioxocarbonate (IV)
View Answer & Discuss (1) WAEC 2012
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974

Which of the following pH values indicates that a solution is a strong base?

  • A. 1
  • B. 5
  • C. 9
  • D. 13
View Answer & Discuss (6) WAEC 2012
975

The hydrolysis of NH\(_4\)CI gives

  • A. an acidic solution
  • B. an alkaline solution
  • C. a buffer solution
  • D. a neutral solution
View Answer & Discuss WAEC 2012
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