Chemistry 7404 Paper 2 June 2021, AQA AS-Level Past Papers with Mark Schemes

AQA AS Level Chemistry (7404) Jun 2021

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The exam emphasizes organic and physical chemistry, covering reaction mechanisms, thermodynamics, and analytical techniques. Key topics include Maxwell-Boltzmann energy distributions, halogenoalkane reactions, CFC environmental impacts, and polymer chemistry. Practical applications involve percentage yield calculations, distillation improvements, and vaporization data analysis using gas laws. Analytical skills are assessed through bond enthalpy derivations, molecular formula calculations, and equilibrium shifts. Reactions like electrophilic addition in alkenes, nucleophilic substitution, and catalytic reforming are explored alongside sustainability aspects like biodegradability and atom economy. Experimental problem-solving integrates stoichiometry, reaction setup evaluations, and theoretical understanding of molecular properties and environmental implications.