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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

Alcohols questions 18 January 2019

1. State the equations for the complete combustion of:(a) ethanol(b) propan-2-ol2. Propan-2-ol and propan-1-ol can both be oxidized by a warm acidified solution of potassium dichromate(VI).(a) Describe... more