20 to 22 September 2019
18 to 20 October 2019
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Electrophilic substitution questions16 February 2019
1. Describe and explain the structure of benzene by considering the hybridization that occurs on each carbon atom.2. Benzene reacts with a mixture of concentrated nitric and sulfuric acid at a temperature... more
Complete course for studentsfree12 February 2019
The purpose of this section is to provide complete syllabus coverage specifically for students who have been signed up to student access by their teacher in a subscribing school. It is designed to be... more
Computer modelling & simulations free12 February 2019
During your practical programme you need to explain the importance (and limitations) of using computer models to simulate experiments and each student should have personal experience of using computer... more
Stereoisomerism answers5 February 2019
Answers to Stereoisomerism questionsIn addition trans-1,2-dichlorocyclobutane exists in two enantiomeric forms. (These are (1S,2S)-1,2-dichlorocyclobutane and (1R,2R)-1,2-dichlorocyclobutane but the... more
Proteins & enzymes 5 February 2019
This topic requires students to understand the primary, secondary, tertiary and quaternary structures of proteins. They can easily understand how the primary structure is obtained by hydrolysing the protein... more
Electrophilic addition questions 3 February 2019
1. Bromine is a non-polar molecule.(a) Explain how it is able to act as an electrophile when it adds to ethene.(b) Name the product when bromine is added to ethene in the absence of water.(c) Explain... more
Nucleophilic substitution questions 30 January 2019
1. Explain the following statements:(a) hydroxide ions are better nucleophiles than water molecules.(b) the hydrolysis of iodoethane is faster than the hydrolysis of bromoethane.(c) the hydrolysis of... more
Halogenoalkanes & benzene questions25 January 2019
1. State the equation for the reaction of 1-bromopropane with warm dilute sodium hydroxide solution and name the organic product.2. (a) Describe the difference between homolytic fission and heterolytic... more
Further aspects of covalent bonding 20 January 2019
Benzene is found in crude oil and is an important industrial chemical, both as a solvent and as a chemical feedstock to make polymers such as polystyrene. It used to be used routinely in schools and universities... more