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SingaporeChemistryQuick questions
Organic Chemistry
Quick questions on Halogen derivatives, nucleophilic substitution and elimination: Singapore A-Level H2 Chemistry
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is elimination?Show answer
With hot ethanolic (not aqueous) , the halogenoalkane undergoes elimination, losing HX to form an alkene:
What is rates of hydrolysis?Show answer
The rate of hydrolysis depends mainly on the carbon-halogen bond strength, not its polarity. Down the group the bond gets weaker (longer, electrons further from the nuclei):
What is q1?Show answer
State the reagent and conditions to convert bromoethane into (a) ethanol and (b) ethene. [2 marks]
What is q2?Show answer
Explain why 2-bromo-2-methylpropane hydrolyses faster than 1-bromobutane. [3 marks]
What is q3?Show answer
Place chloroethane, bromoethane and iodoethane in order of increasing rate of hydrolysis and explain. [2 marks]
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