Chapter 2: Mechanisms and Curly-Arrow Logic

A-level ChemistryModule 4: Core Organic Chemistry8 topicsHigher

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Module 4: Core Organic Chemistry: Mechanisms and Curly-Arrow Logic - Authored Long Answer Questions

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4 questions25 marks37.5 min

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6 marksdescribestandardOCR A

For Mechanisms and Curly-Arrow Logic, describe how nucleophiles, electrophiles and curly-arrow movement applies to bromoethane reacting with hydroxide ions.

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6 markscalculatehardOCR A

Using bromoethane reacting with hydroxide ions, calculate a relevant OCR A Mechanisms and Curly-Arrow Logic quantity and explain the physical or chemical meaning of the answer. Show equation, substitution, answer and unit.

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7 marksexplainhardOCR A

Mechanisms and Curly-Arrow Logic: C-Br bond enthalpy (kJ mol-1) vs Relative hydrolysis rate (s-1)

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The graph for Mechanisms and Curly-Arrow Logic shows data from bromoethane reacting with hydroxide ions. Explain the pattern using the data and relevant chemistry principles.

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6 marksevaluatestandardOCR A

In bromoethane reacting with hydroxide ions, evaluate the experimental method or model assumptions used when applying nucleophiles, electrophiles and curly-arrow movement.

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← Previous

1. Organic Formulae, Nomenclature and Isomerism

3. Alkanes, Cracking and Radical Substitution

Key learning objectives

Understand the key principles behind Mechanisms and Curly-Arrow Logic.
Apply these ideas to exam-style questions.
Recall the essential definitions and key terms.