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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 141

Which statement best describes the electron arrangement of an atom in its ground state?
Atomic structureAtomic structuremedium

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Question 142

Which subatomic particle has a negative charge and is found outside the nucleus of an atom?
Atomic structureAtomic Structureeasy

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Question 143

Calculate the number of moles in 44 g of carbon dioxide (CO2). (Atomic masses: C=12, O=16)
Mole conceptMole Concepteasy

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Question 144

What effect does increasing temperature have on the rate of a chemical reaction, generally?
Rates and equilibriumRates of Reactionmedium

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Question 145

At equilibrium in a closed system, which statement is true?
Rates and equilibriumChemical Equilibriummedium

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Question 146

Which type of chemical bond results from the electrostatic attraction between positively charged metal ions and delocalized electrons?
Chemical bondingChemical Bondinghard

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Question 147

Which reagent is commonly used to distinguish between an aldehyde and a ketone?
Organic chemistryOrganic Analysishard

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Question 148

How many moles are present in 22 grams of CO2? (Molar mass of CO2 = 44 g/mol)
Mole conceptMole Concept and Stoichiometrymedium

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Question 149

Which functional group is present in an alcohol?
Organic chemistryOrganic Chemistry: Functional Groupseasy

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Question 150

In the equilibrium reaction N2 + 3H2 ⇌ 2NH3, what effect will increasing pressure have?
Rates and equilibriumChemical Equilibriumhard

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