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WAEC Chemistry Practice

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Question 1

What is the maximum number of electrons that can occupy the 3p subshell in an atom?

Atomic structure and quantum numbersAtomic structure and quantum numberseasy

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Question 2

Which type of chemical bond involves the sharing of electron pairs between atoms?

Chemical bondingChemical bondingeasy

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Question 3

Which state of matter has a definite volume but no definite shape?

Structure and properties of matterStructure and properties of mattereasy

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Question 4

In the Periodic Table, elements in the same group have the same number of:

PeriodicityPeriodicityeasy

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Question 5

What is the effect of increasing temperature on the rate of a chemical reaction?

Rates of reactions (kinetics)Rates of reactionseasy

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Question 6

Which of the following represents a state of chemical equilibrium?

EquilibriumEquilibriumeasy

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Question 7

Which of the following is a characteristic of acids?

Acids, bases, saltsAcids, bases, saltseasy

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Question 8

In a redox reaction, the substance that gains electrons is called the:

Redox reactionsRedox reactionsmedium

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Question 9

Which electrode in an electrochemical cell undergoes oxidation?

ElectrochemistryElectrochemistrymedium

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Question 10

Which functional group is present in alcohols?

Organic chemistryOrganic chemistryeasy

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Question 11

Which type of polymerization involves the repeated addition of monomers without the loss of any atoms?

Polymer chemistryPolymer chemistrymedium

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Question 12

In stoichiometry, how many moles of water are produced from the combustion of 2 moles of propane (C3H8)?

Calculation chemistry (stoichiometry)Calculation chemistrymedium

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Question 13

Which industrial process is used for the large-scale production of ammonia?

Industrial chemistryIndustrial chemistrymedium

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Question 14

Which pollutant is mainly responsible for acid rain formation?

Environmental chemistryEnvironmental chemistryeasy

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Question 15

What is the principal quantum number 'n' used to describe in an atom?

Atomic structure and quantum numbersAtomic structure and quantum numbersmedium

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Question 16

Which type of bond is formed by the electrostatic attraction between oppositely charged ions?

Chemical bondingChemical bondingeasy

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Question 17

Which property is typical of metals?

Structure and properties of matterStructure and properties of mattereasy

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Question 18

Which period in the Periodic Table contains the element with atomic number 17?

PeriodicityPeriodicityeasy

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Question 19

What type of catalyst is commonly used in the decomposition of hydrogen peroxide?

Rates of reactions (kinetics)Rates of reactionsmedium

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Question 20

In the equilibrium system: N2 + 3H2 ⇌ 2NH3, what effect does increasing pressure have?

EquilibriumEquilibriummedium

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Question 21

Which of the following is a strong base?

Acids, bases, saltsAcids, bases, saltseasy

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Question 22

In a redox reaction, which species is oxidized?

Redox reactionsRedox reactionseasy

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Question 23

In an electrochemical cell, electrons flow from the:

ElectrochemistryElectrochemistryeasy

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Question 24

Which organic compound contains a carboxyl functional group?

Organic chemistryOrganic chemistryeasy

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Question 25

Which polymer is formed from the monomer ethene?

Polymer chemistryPolymer chemistrymedium

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Question 26

What volume of hydrogen gas at STP is produced when 5 moles of zinc react with excess hydrochloric acid? Zn + 2HCl → ZnCl2 + H2

Calculation chemistry (stoichiometry)Calculation chemistrymedium

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Question 27

Which industrial chemical is produced by the Contact process?

Industrial chemistryIndustrial chemistrymedium

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Question 28

Which gas contributes most to the greenhouse effect?

Environmental chemistryEnvironmental chemistryeasy

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Question 29

What does the magnetic quantum number (m_l) specify?

Atomic structure and quantum numbersAtomic structure and quantum numbersmedium

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Question 30

Which of the following molecules has a triple covalent bond?

Chemical bondingChemical bondingeasy

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Question 31

Which state of matter has particles that are closely packed in a fixed, orderly arrangement?

Structure and properties of matterStructure and properties of mattereasy

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Question 32

Which element has the highest first ionization energy in Period 3?

PeriodicityPeriodicitymedium

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