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Chemistry WAEC Past Questions

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1611

Equal masses of calcium trioxocarbonate(iv) were added to dilute hydrochloric acid at the temperature specified. Under which of the following conditions would the reaction be slowest?

  • A. Calcium trioxocarbonate ( iv ) chips a 20°C
  • B. CalcIum trioxocarbonate (IV) chips at 40°C
  • C. Calcium trioxocarbonate (IV) powder at 20'C
  • D. Calcium trioxocarbonate (IV) powder at 40'C
View Answer & Discuss (1) WAEC 2020
1612

The high solubility of ethanol in water is due to?

  • A. its low boiling point.
  • B. its low freezing point.
  • C. its covalent nature
  • D. hydrogen bonding
View Answer & Discuss WAEC 2020
1613

Which of the following pairs of properties of alkali metals decreases down the group?

  • A. First ionization energy and reactivity
  • B. melting point and atomic radius
  • C. Reactivity and electronegativity
  • D. First ionization energy and melting point
View Answer & Discuss (2) WAEC 2020
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1614

The most suitable process of obtaining water from an aqueous solution of sugar i

  • A. Crystallization
  • B. Distillation
  • C. Filtration
  • D. Decantation
View Answer & Discuss (7) WAEC 2020
1615

Group VIl elements in their combined states are called?

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