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WAEC ChemistryNigeria

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Question 191

In a reaction, the rate doubles when the concentration of reactant A is doubled and remains the same when the concentration of reactant B is doubled. What is the order of the reaction with respect to A and B respectively?
Rates of reactions (kinetics)Kineticsmedium

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Question 192

At equilibrium, which of the following statements is true?
EquilibriumChemical Equilibriumeasy

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Question 193

Which of the following is a characteristic property of a strong acid?
Acids, bases, saltsAcids, Bases and Saltseasy

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Question 194

Which type of polymerization involves the joining of monomers with the elimination of a small molecule like water?
Polymer chemistryPolymer Chemistrymedium

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Question 195

Calculate the mass of CO2 produced when 44 g of ethanol (C2H5OH) is completely burned. (Molar mass: C=12, H=1, O=16)
Calculation chemistry (stoichiometry)Stoichiometryhard

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Question 196

What effect does increasing the temperature generally have on the rate of a chemical reaction?
Rates of reactions (kinetics)Kineticseasy

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Question 197

In a chemical equilibrium, what happens to the concentrations of reactants and products?
EquilibriumChemical Equilibriummedium

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Question 198

In an electrochemical cell, which electrode undergoes oxidation?
ElectrochemistryElectrochemistrymedium

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Question 199

What is the empirical formula of a polymer made from repeating units of C2H4?
Polymer chemistryPolymer Chemistryhard

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Question 200

Which element has the greatest atomic radius?
PeriodicityPeriodicityeasy

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