OCR GCSE Twenty First Century Science - Chemistry B - J258 过往试题分析

The June 2025 Foundation Tier Chemistry B series (J258/01 Breadth and J258/02 Depth, 90 marks each) is accessible: roughly half of the marks come from tick-box, matching and short-recall items, with a handful of multi-step calculations and two 6-mark level-of-response questions in Paper 2 providing the main stretch.

OCR J258/03 and J258/04 (Higher Tier, June 2025) are two 90-mark, 1 hour 45 minute papers. Paper 03 (Breadth) is made up of 10 short-answer questions across the whole course. Paper 04 (Depth) has 9 longer, more connected questions, including two 6-mark level-of-response items and heavier calculation. Mass and amount calculations, the Periodic Table and rate of reaction carry the most marks.

A comprehensive analysis of the OCR Twenty First Century Science Chemistry B June 2024 series (incorporating the J258/03 and J258/04 Higher papers). The papers tested core chemistry fundamentals, with heavy mark concentrations in Material Choices and Chemical Analysis, demanding robust mathematical calculations and precision in explanations of chemical kinetics and environmental trends.

An in-depth analysis of the June 2023 OCR GCSE Chemistry B Twenty First Century Science series, focusing on core quantitative methods, organic structures, environmental trends, and foundational atomic theory across Breadth and Depth papers.

A comprehensive analysis of the June 2022 OCR GCSE (9-1) Chemistry B J258 examination series (papers J258/01, J258/02, J258/03, J258/04). It covers key core areas like rates of reaction, stoichiometry, chemical bonding, organic chemistry, electrolysis, and atmospheric changes.