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WAEC Chemistry – Sierra Leone

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Question 231

In a chemical equilibrium, what remains constant?
EquilibriumEquilibriummedium

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Question 232

Which type of polymerization involves the repeated addition of monomers containing double bonds?
Polymer chemistryPolymer chemistryhard

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Question 233

Calculate the mass of water formed when 2 moles of hydrogen gas react completely with oxygen gas. (Molar mass of H₂O = 18 g/mol)
Calculation chemistry (stoichiometry)Calculation chemistrymedium

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Question 234

Which quantum number defines the shape of an atomic orbital?
Atomic structure and quantum numbersAtomic structure and quantum numberseasy

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Question 235

Which type of bond is formed by the complete transfer of electrons from one atom to another?
Chemical bondingChemical bondingeasy

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Question 236

Which property best explains why gases are highly compressible compared to solids and liquids?
Structure and properties of matterStructure and properties of mattereasy

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Question 237

Which type of polymerization involves the joining of monomers with the elimination of a small molecule such as water?
Polymer chemistryPolymer chemistryhard

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Question 238

Calculate the mass of carbon dioxide produced when 44 g of carbon reacts completely with oxygen. (C atomic mass = 12, O atomic mass =16)
Calculation chemistry (stoichiometry)Calculation chemistryhard

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Question 239

Which of the following correctly describes a property of ionic compounds?
Structure and properties of matterStructure and properties of mattermedium

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Question 240

In a reaction where the concentration of reactants doubles and the rate of reaction quadruples, what is the order of the reaction with respect to that reactant?
Rates of reactions (kinetics)Kineticsmedium

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