Practice R3.3 Electron sharing reactions with authentic IB Chemistry exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like atomic structure, chemical reactions, and organic chemistry. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Chlorine radicals can initiate a chain reaction.
Write the initiation step for the reaction between and .
State what happens to the electrons in this initiation step.
Identify the type of arrow used to represent movement of a single electron.
The substitution of alkanes with halogens proceeds via a radical mechanism.
Write the overall equation for the reaction between methane and chlorine.
State the type of reaction this represents.
Explain why multiple substitution products can form in this reaction.
A radical chain reaction involves several steps.
Write one possible propagation step for the reaction of with .
Write the second propagation step that regenerates a chlorine radical.
Explain why chain reactions continue once started.
Radicals are highly reactive species.
State what is meant by the term radical.
Identify the number of unpaired electrons in a chlorine atom radical.
Draw the dot-and-cross representation of a chlorine radical, .
Consider the formation of radicals from chlorine molecules.
State the name of the process that produces radicals from molecules.
Write the equation for the homolytic fission of using dots to show electrons.
Describe the condition needed to initiate this process.
Consider the radical substitution between and .
Write the initiation step.
Write two possible termination steps.
Explain what is meant by a termination step.
Radicals can be represented with dot notation and fish-hook arrows.
Draw the fish-hook arrows to represent the homolytic fission of .
Write the product(s) of this fission.
State the role of light in this process.
The compound below is commonly used in artificial fruit flavouring.
Identify the homologous series to which ethyl butanoate belongs.
State the functional group present in ethyl butanoate.
Name the two organic compounds used to prepare ethyl butanoate.
Write an equation for the formation of ethyl butanoate from these compounds, including structural formulas.
Outline the type of reaction.
Suggest why esters like ethyl butanoate are often used in perfumes and flavourings.
Predict the products of the complete hydrolysis of ethyl butanoate under acidic conditions.
Describe how infrared (IR) spectroscopy could be used to distinguish ethyl butanoate from the carboxylic acid used to make it.
What must be present on a nucleophile?
What is the formal charge of the oxygen atom in ?