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WAEC ChemistryNigeria

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Question 1

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

Atomic structure and quantum numbersAtomic structure and quantum numberseasy

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Question 2

Which type of chemical bond is formed by the transfer of electrons from one atom to another?

Chemical bondingChemical bondingeasy

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Question 3

Which of the following solids has the highest melting point?

Structure and properties of matterStructure and properties of mattermedium

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Question 4

Which element has the highest first ionization energy?

PeriodicityPeriodicitymedium

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Question 5

How does increasing the concentration of reactants affect the rate of a chemical reaction?

Rates of reactions (kinetics)Rates of reactionseasy

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Question 6

In the equilibrium reaction N2 + 3H2 ⇌ 2NH3, what will happen if the pressure is increased?

EquilibriumEquilibriummedium

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Question 7

Which of the following is a strong acid?

Acids, bases, saltsAcids, bases, saltseasy

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Question 8

In a redox reaction, the species that loses electrons is called the:

Redox reactionsRedox reactionsmedium

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Question 9

What is the main purpose of the salt bridge in an electrochemical cell?

ElectrochemistryElectrochemistryhard

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Question 10

Which of the following polymers is formed by addition polymerization?

Polymer chemistryPolymer chemistryhard

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