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Chemistry 2013 WAEC Past Questions

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1

Which of the following instruments is used in detecting the presence of radiation?

  • A. Cathode ray tube
  • B. Geiger-Muller counter
  • C. Mass spectrometer
  • D. X-ray tube
View Answer & Discuss (1) WAEC 2013
2

The molecule which has a linear shape is

  • A. CH4
  • B. NH3
  • C. H2S
  • D. CO2
View Answer & Discuss WAEC 2013
3

The formula of the compound formed between a trivalent metal, M and a divalent non-metal, Y is

  • A. M2Y3
  • B. M3Y2
  • C. MY
  • D. M3Y
View Answer & Discuss (2) WAEC 2013
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4

An atom of an element X gains two electrons. The symbol of the ion formed is

  • A. X +
  • B. X 2+
  • C. X 2-
  • D. X -
View Answer & Discuss (4) WAEC 2013
5

Which of the following statements is correct?

  • A. Atomic size decreases down the group
  • B. Atomic size increases across the period
  • C. Anions are smaller than the parent atom
  • D. Cations are smaller than the parent atom
View Answer & Discuss (3) WAEC 2013
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