Chemistry 7404 Paper 2 June 2023, AQA AS-Level Past Papers with Mark Schemes

AQA AS Level Chemistry (7404) Jun 2023

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The exam emphasizes organic and physical chemistry, addressing reaction mechanisms, intermolecular forces, and quantitative analysis. Key topics include nucleophilic substitution and electrophilic addition, enthalpy of combustion calculations, and reaction rates of halogenoalkanes. Analytical techniques involve IR spectroscopy, high-resolution mass spectrometry, and energy density evaluation. Practical applications explore catalytic cracking, distillation setups, and bioethanol's carbon neutrality. Structural and stereochemical aspects are analyzed in alkenes, alcohols, and polymers, alongside environmental implications of combustion products. Maxwell-Boltzmann distribution curves and bond enthalpy derivations integrate theoretical understanding with experimental data to assess chemical properties, reactivity, and sustainability.