O-Level Exam: Chemistry Recap

Front

What two reactants form butyl propanoate in an esterification?

Back

Butanol and propanoic acid.

Front

What type of reaction is the extraction of metals from their ores?

Back

Redox reaction.

Front

What chemical process occurs when electricity is applied to a solution of copper(II) sulfate?

Back

Electrolysis, bringing forward copper and oxygen as products.

Front

Calculate the maximum volume of carbon dioxide generated from a reaction if the answer is 89.6.

Back

89.6 liters.

Front

Which mole is correct to calculate the maximum yield of carbon dioxide for a given reaction?

Back

Option c.

Front

Define esterification in chemistry.

Back

Esterification is a chemical reaction that forms an ester from an alcohol and a carboxylic acid.

Front

What is a redox reaction?

Back

A redox reaction involves the transfer of electrons between two species, resulting in changes in oxidation states.

Front

What is electrolysis?

Back

Electrolysis is a chemical process that uses electricity to drive a non-spontaneous reaction.

Front

What is the general formula for calculating moles?

Back

Moles = mass (g) / molar mass (g/mol).

Front

What is the significance of the mole in chemistry?

Back

The mole is a fundamental unit in chemistry that quantifies the amount of substance.