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Monday, 15 June 2026
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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 1336:
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 & Explanation
Question 1337:
Metals can be stretched into wires because they are
  • A Ductile
  • B Good conductors
  • C Lustrous
  • D Malleable
View Answer & Explanation
Question 1338:
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 & Explanation
Question 1339:
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 & Explanation
Question 1340:
Which of the following arrangements shows increasing order of reactivity of the halogens?
  • A F2 > Cl2 > Br2 >I2
  • B I2 < Br2 < Cl2
  • C F2 < Cl2 < Br2
  • D I2 > Br2 > Cl2 > F2
View Answer & Explanation