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Chemistry 2018 WAEC Past Questions

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16

When a salt is added to its saturated solution, the salt

  • A. dissolves and the solution becomes super saturated
  • B. dissolves and the solution becomes unsaturated
  • C. precipitates and the solution remains unchanged
  • D. dissolves and crystals are formed
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17

When substance X was added to a solution of bromine water, the solution became colourless. X is likely to be

  • A. propane
  • B. propanoic acid
  • C. propyne
  • D. propanol
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18

The preferential discharge of ions during electrolysis is influenced by the 

  • A. mechanism of electrolysis
  • B. electrolytic reactions
  • C. nature of the electrode
  • D. type of electrolytic cell
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19

The valence electrons of \(_{12}Mg\) are in the

  • A. 3s orbital
  • B. 2p\(_{x}\)
  • C. 2s orbital
  • D. 1s orbital
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20

Stainless steel is an alloy comprising of

  • A. Fe and C
  • B. Fe and Ni
  • C. Fe, C and Ni
  • D. Fe, C and Al
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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208