This question was 2003, so before the days of sample answers, but I found the marking criteria if anyone's interested.
MARKING GUIDELINES
6–7
• Demonstrates an extensive knowledge of the Haber process including
factors that are monitored and managed.
• Provides a comprehensive explanation of why reaction conditions are
monitored or managed, relating these to the nature of the reaction
• Provides an evaluation
4–5
• Demonstrates a thorough knowledge of the Haber process
• Explains why some reaction conditions are monitored or managed
2-3
• Demonstrates a sound knowledge of the Haber process
OR
• Demonstrates a limited knowledge of the Haber process and identifies a
reaction condition(s) that is (2 marks)/are monitored or managed (3 marks)
1
• Identifies the reactants and product of the Haber process
OR
• Gives one correct statement about the Haber process
OR
• Identifies one reaction condition that is monitored