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Chemistry 2020 WAEC Past Questions

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11

Group VIl elements in their combined states are called?

  • A. Halogens
  • B. Anions
  • C. Halide
  • D. Cations
View Answer & Discuss (5) WAEC 2020
12

When an ionic bond is broken, bonding electrons are

  • A. shared between participating atoms
  • B. gained by the most electropositive atom
  • C. gained by the most electronegative atom
  • D. lost by both participating atoms.
View Answer & Discuss (7) WAEC 2020
13

The oxidation state of chlorine in NaClO\(_3\) is?

  • A. +1
  • B. +3
  • C. +5
  • D. +6
View Answer & Discuss (3) WAEC 2020
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
14

A balanced chemical equation is based on the law of?

  • A. Periodicity
  • B. Constant composition
  • C. Multiple proportion
  • D. Conservation of mass
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15

Which of the following pairs of elements has the greatest difference in electronegativity?

  • A. Na and F
  • B. Na and CI
  • C. Na and Br
  • D. Na and I
View Answer & Discuss WAEC 2020
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