IB past paper analysis

Chemistry HL
November 2025 · Paper 2 · TZ1

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  • 5questions
  • 90marks
  • 48question parts
  • 32micro-topics

What this paper tests

Mark distribution

  • Reactivity 3: What are the mechanisms of chemical change?23%
  • Structure 3: Classification of matter21%
  • Reactivity 2: How much, how fast and how far?18%
  • Structure 1: Models of the particulate nature of matter14%
  • Reactivity 1: What drives chemical reactions?12%
  • Structure 2: Models of bonding and structure11%

Hardest areas (by marks)

  1. 1.Nucleophilic substitution: SN1 and SN2 (HL)4 marks
  2. 2.Spectroscopic identification of organic compounds4 marks

Question types

find / solve: 27%explain / justify: 23%show that / prove: 21%write down / state: 13%21%
  • find / solve27%
  • explain / justify23%
  • show that / prove21%
  • write down / state13%

21% of parts are show / prove.

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Questions in this paper

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Where to go next

Good to know

Can I download Chemistry HL November 2025 TZ1 Paper 2 here?

No. The paper and its mark scheme belong to the IB and are not reproduced. This page gives the structure of every question (marks, command term, micro-topic, the skill tested), the exam analysis, and practice questions we wrote to test the same skills. Subscribers can also open our summary of how each part's marks are awarded.

Which topics dominate November 2025 TZ1 Paper 2?

Reactivity 3: What are the mechanisms of chemical change? 23% (typical 20%), Structure 3: Classification of matter 21% (typical 15%), Reactivity 2: How much, how fast and how far? 18% (typical 23%).

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