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WAEC Chemistry AI Practice

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Note: Diagram-based questions are coming soon. WAEC Biology Paper includes ~5 diagram questions.

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Question 201

In a redox reaction, what occurs at the cathode?
Redox reactionsRedox reactionsmedium

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Question 202

Which polymer is formed by the addition polymerization of ethene?
Polymer chemistryPolymer chemistrymedium

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Question 203

How many moles of water are produced when 2 moles of propane (C3H8) are completely combusted?
Calculation chemistry (stoichiometry)Calculation chemistryhard

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Question 204

What is the main factor responsible for the increase in atomic radius down a group in the periodic table?
PeriodicityPeriodicitymedium

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Question 205

In a reaction where the rate doubles as the concentration of a reactant doubles, the order of reaction with respect to that reactant is:
Rates of reactions (kinetics)Rates of reactionseasy

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Question 206

Which of these best describes a catalyst’s role in a chemical reaction?
Rates of reactions (kinetics)Rates of reactionsmedium

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Question 207

In the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), what will happen to the position of equilibrium if pressure is increased?
EquilibriumEquilibriummedium

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Question 208

During electrolysis of molten sodium chloride, which species is discharged at the cathode?
ElectrochemistryElectrochemistrymedium

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Question 209

Which of the following polymers is formed by the addition polymerization of ethene?
Polymer chemistryPolymer chemistryeasy

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Question 210

Calculate the mass of calcium carbonate (CaCO3) needed to react completely with 0.5 moles of hydrochloric acid (HCl), given the reaction: CaCO3 + 2HCl → CaCl2 + CO2 + H2O
Calculation chemistry (stoichiometry)Calculation chemistryhard

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