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Chemistry WAEC Past Questions

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1081
The mass of potassium hydroxide required to make 300.ocm3 of 0.4 moldm-3 solution is {KOH = 56.0}
  • A. 26.88g
  • B. 13.44g
  • C. 6.72g
  • D. 3.36g
View Answer & Discuss WAEC 2016
1082
Metals can be stretched into wires because they are
  • A. Ductile
  • B. Good conductors
  • C. Lustrous
  • D. Malleable
View Answer & Discuss (7) WAEC 2016
1083
Aluminium is used in the manufacture or aircraft because it
  • A. Is hard and brittle
  • B. Is light and resists corrosion
  • C. Has high density and conducts electricity
  • D. Is malleable and ductile
View Answer & Discuss WAEC 2016
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1084

An unsaturated solution differs from a saturated solution at a given temperature because it

  • A. Cannot dissolve more solute
  • B. Can hold more solute than it can actually dissolve
  • C. Can still dissolve more solute at given temperature
  • D. Form crystal more easily on cooling
View Answer & Discuss (3) WAEC 2016
1085

Which of the following arrangements shows increasing order of reactivity of the halogens?

  • A. F2 > Cl2 > Br2 >I2
  • B. I2 < Br2 < Cl2< F2
  • C. F2 < Cl2 < Br2< I2
  • D. I2 > Br2 > Cl2 > F2
View Answer & Discuss (21) WAEC 2016
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