Aqa A‑Level Chemistry June 2025/2026 Verified Mark Schemes – Paper 1 Complete Review

AQA
MARK SCHEME
A-level CHEMISTRY
Paper 1: Physical and Inorganic Chemistry
Specification Code: 7405/1
Series: June 2025
Version: 1.0 Final


AQA A-LEVEL CHEMISTRY JUNE 2025/2026 VERIFIED MARK SCHEMES – PAPER 1
COMPLETE REVIEW




✓ VERIFIED MARK SCHEME

, Marking Guidance

M mark Method mark — awarded for correct method, even if the answer is numerically
incorrect.
A mark Accuracy mark — awarded for a correct answer following a correct method (can only be
awarded if the M mark has been awarded).
B mark Independent mark — awarded regardless of the method used.
C mark Communication mark — awarded for a clear and correct explanation or description.

ECF Error carried forward — credit given where a candidate uses an incorrect value
consistently.
ORA Or reverse argument — the mark may be awarded for the converse argument.

ALLOW Indicates acceptable alternative answers.
IGNORE Indicates information that should not affect the award of the mark.
DO NOT Indicates incorrect answers that should not receive the mark.
ALLOW

Note: Where a candidate's answer is ambiguous, benefit of the doubt should not be given. Where a unit is
required and omitted, the mark should not be awarded unless stated otherwise.