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1031
Which of the following gases is used to retard the vaporization of the filament in a light bulb?
  • A. Argon
  • B. Helium
  • C. Hydrogen
  • D. Oxygen
View Answer & Discuss (2) WAEC 2014
1032
The most common process in the extraction of metals from their ore is
  • A. catalysis
  • B. electrolysis
  • C. oxidation
  • D. reduction
View Answer & Discuss (14) WAEC 2014
1033

The oxide from electric power station is

  • A. carbon (IV) oxide
  • B. copper (ll) oxide
  • C. nitrogen (IV) oxide
  • D. sulphur (IV) oxide
View Answer & Discuss (9) WAEC 2014
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1034

If the relative molecular mass of an element is not a whole number, it can be deduced that the element is

  • A. naturally radioactive
  • B. abundant in nature
  • C. a transition metal
  • D. an isotopic mixture
View Answer & Discuss (5) WAEC 2002
1035
The atom of an element X is represented as \(^y_z X\). The basic chemical properties of X depend on the value of
  • A. Y
  • B. Z
  • C. Y - Z
  • D. Z - Y
View Answer & Discuss (5) WAEC 2002
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