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1691

Which of the following equations represents the reaction of chlorine with hot concentrated sodium hydroxide solution?

  • A. 2NaOH+CI2 → NaCIO + NaCI + H2O
  • B. 4NaOH + 2CI → 4NaCI + 2H2O + O2
  • C. 6NaOH + 3CI2 → NaCIO3 + 5NaCI + 3H2O
  • D. 2NaOH + CI2 → 2NaCI + H2O2
  • E. NaOH + 2CI2 + H2O → NaCI + 3HCI + O2
View Answer & Discuss (8) WAEC 1988
1692
Aqueous sodium trioxocarbonate (IV) solution is alkaline because
  • A. acid from which it is formed is strong
  • B. sodium is an alkali metal
  • C. sodium trioxocarbonate (IV) is decomposed by water
  • D. sodium trioxocarbonate (lV) is stable to heat
  • E. sodium triocarbonate (IV) is hydrolysed in water
View Answer & Discuss (2) WAEC 1988
1693
Which of the following correctly explains why iodine crystals change directly into the gaseous state when heated?
  • A. lodine crystals sublime
  • B. lodine atoms are held together by strong forces
  • C. lodine molecules are held together by weak forces
  • D. lodine molecules are covalent
  • E. lodine is a solid at room temperature
View Answer & Discuss (1) WAEC 1988
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1694
Which of the following is a waste product in the Solvary Process for the manufacture of sodium trioxocarbonate (IV)?
  • A. Ammonium chloride
  • B. Brine
  • C. Limestone
  • D. Calcium oxide
  • E. Calcium chloride
View Answer & Discuss (3) WAEC 1988
1695
When copper (ll) chloride solution is treated with excess aqueous ammonia, a deep blue solution results This is due to the presence of
  • A. (CuNH4)3+ ions
  • B. (CuCI4)2-ions
  • C. [Cu(OH)4]2- ions
  • D. Cu(H2-O)42+ IONS
  • E. [cU(NH3)4] ions
View Answer & Discuss (3) WAEC 1988
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