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4486

The oxidation number of Chromium in Na\(_2\)Cr\(_2\)O\(_7\) is 

  • A. +2
  • B. +6
  • C. +7
  • D. +12
View Answer & Discuss (2) WAEC 2024
4487

The most important ore of aluminium is 

  • A. bauxite
  • B. haematite
  • C. magnetite
  • D. monazite
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4488

Bases normally 

  • A. are corrosive
  • B. turn litmus paper from blue to red
  • C. turn litmus paper from red to blue
  • D. are non-metal oxides
View Answer & Discuss (3) WAEC 2024
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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4489

The product formed when concentrated sodium chloride solution is electrolysed using carbon electrodes is

  • A. chloride water
  • B. hydrochloric acid
  • C. sodium hydroxide
  • D. sodium oxochlorate (I)
View Answer & Discuss (4) WAEC 2024
4490

The product of the reaction between ethanol and excess acidified K\(_2\)Cr\(_2\)O\(_7\) is

  • A. CH\(_2\)=CH\(_2\)
  • B. CH\(_3\)OCH\(_3\)
  • C. CH\(_3\)COOH
  • D. CH\(_3\)CH\(_3\)
View Answer & Discuss (3) WAEC 2024
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