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NECTA Chemistry AI Practice

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Note: Diagram-based questions are coming soon. WAEC Biology Paper includes ~5 diagram questions.

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Question 271

Which of the following describes a buffer solution?
Acids, bases, saltsAcids, bases, saltshard

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Question 272

What is the number of protons in an atom of element X with atomic number 12?
Atomic structureAtomic Structureeasy

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Question 273

Calculate the number of moles in 88 grams of CO2 (Molar mass of CO2 = 44 g/mol).
Mole conceptMole Concepteasy

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Question 274

Which of the following represents a correct Lewis dot structure for a nitrogen atom?
Atomic structureAtomic Structurehard

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Question 275

What functional group is present in alcohols?
Organic chemistryFunctional groups in organic chemistryeasy

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Question 276

At equilibrium in a closed system, what happens to the concentrations of reactants and products?
Rates and equilibriumChemical equilibriummedium

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Question 277

Which compound is an example of an organic acid?
Organic chemistryOrganic acids and basesmedium

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Question 278

Calculate the number of moles in 22 grams of carbon dioxide (CO₂). (Atomic masses: C=12, O=16)
Mole conceptMole Conceptmedium

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Question 279

Which of the following represents a reversible reaction?
Rates and equilibriumRates and Equilibriumhard

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Question 280

What will happen to the rate of a chemical reaction if the temperature is increased?
Rates and equilibriumRates and Equilibriummedium

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