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4206

If the molar mass of X(HCO3)\(_{2}\) is 162 g mol\(^{-1}\), determine the relative atomic mass of X.
[H = 1.0, C = 12.0, 0 = 16.0]

  • A. 40
  • B. 48
  • C. 61
  • D. 101
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4207

Charcoal is used in the decolourization of sugar because of its

  • A. absorption property.
  • B. amorphous property.
  • C. oxidizing property.
  • D. adsorption property.
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4208

The first definition of an element was made by

  • A. J. Dalton.
  • B. A. Lavoisier.
  • C. R. Boyle.
  • D. J. J. Thompson.
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4209

Which of the following scientists formulated the law of conservation of mass?

  • A. A. Lavoisier
  • B. J. Dalton
  • C. R. Boyle
  • D. J. Proust
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4210

Which of the following sketches is a graphical representation of Boyle's law?

  • A. A
  • B. B
  • C. C
  • D. D
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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