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WAEC Chemistry – Liberia

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Question 11

Which of the following quantum numbers describes the shape of an atomic orbital?

Atomic structure and quantum numbersAtomic structure and quantum numberseasy

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Question 12

What type of bonding is present in sodium chloride (NaCl)?

Chemical bondingChemical bondingeasy

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Question 13

Which property is generally associated with ionic compounds?

Structure and properties of matterStructure and properties of mattermedium

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Question 14

How does increasing temperature affect the rate of a chemical reaction?

Rates of reactions (kinetics)Rates of reactionseasy

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Question 15

In a reversible reaction at equilibrium, what happens if the concentration of a reactant is increased?

EquilibriumEquilibriummedium

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Question 16

Which of the following is a characteristic of a strong acid?

Acids, bases, saltsAcids, bases, saltseasy

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Question 17

In an electrochemical cell, which electrode is the site of oxidation?

ElectrochemistryElectrochemistrymedium

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Question 18

Which polymer is commonly formed by addition polymerization of ethene?

Polymer chemistryPolymer chemistrymedium

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Question 19

Calculate the number of moles in 36 grams of water (H₂O). (Molar mass of H₂O = 18 g/mol)

Calculation chemistry (stoichiometry)Calculation chemistryeasy

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Question 20

Which quantum number determines the shape of an atomic orbital?

Atomic structure and quantum numbersAtomic Structure and Quantum Numberseasy

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