Chemistry · Paper 1A · HL

May 2025 TZ1

A video for every question in the Chemistry Paper 1A HL paper from May 2025 TZ1. Each one goes through the question and the thinking behind it, so you can see where your approach differed. Attempt the paper first, then use the grid to jump to whichever questions you need.

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About this paper

Chemistry Paper 1A at HL has 40 questions and is sat under exam conditions. It covers recall and application across the core syllabus; HL papers add the higher level material on top of the core.

Studying this paper

Don't work through the videos in order. Mark your attempt, then watch only the questions you missed plus the ones you got right on a guess, those are the ones most likely to cost you marks for real. If the misses cluster in one topic, go back to the theory before starting another paper.