A-LevelChemistryEquilibriaOct/Nov 2018Paper 1 Q111 Mark
Nitrogen and hydrogen can react together to form ammonia. The formation of ammonia is exothermic. The rate and yield of the reaction can be altered by changing the conditions under which the reaction is carried out. Which row shows the effects of adding iron to the mixture and increasing the temperature?
Aadding iron: has no effect on the equilibrium yield, increasing the temperature: reduces the equilibrium yield
Badding iron: increases the equilibrium yield, increasing the temperature: increases the equilibrium yield
Cadding iron: increases the equilibrium yield, increasing the temperature: increases the rate
Dadding iron: increases the rate, increasing the temperature: has no effect on the equilibrium yield
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The correct answer is A. This question tests the candidate's understanding of equilibria within the Chemistrysyllabus. The examiner's mark scheme requires...
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