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Chemistry WAEC Past Questions

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1191

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
View Answer & Discuss WAEC 2018
1192

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
View Answer & Discuss WAEC 2018
1193

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

  • A. 3s orbital
  • B. 2p\(_{x}\)
  • C. 2s orbital
  • D. 1s orbital
View Answer & Discuss WAEC 2018
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1194

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
View Answer & Discuss (1) WAEC 2018
1195

The number of Hydrogen ions in 1.0\(dm^{3}\) of 0.02\(moldm^{-3}\) tetraoxosulphate(VI) acid is   \([N_{A} = 6.02 \times 10^{23}]\)

  • A. \(1.2 \times 10^{22}\)
  • B. \(1.2 \times 10^{23}\)
  • C. \(2.4 \times 10^{22}\)
  • D. \(2.4 \times 10^{23}\)
View Answer & Discuss (6) WAEC 2018
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