O-Level Chemistry QA Table for 6092 Paper 3
Study guide
O-Level Chemistry QA table guide for 6092 Paper 3: cation, anion, and gas tests from the supplied QA Notes, plus reagent order and observation wording.
Fast answer for QA table searches
The O-Level Chemistry QA table for 6092 Paper 3 covers cation tests with aqueous sodium hydroxide and aqueous ammonia, anion tests with acidified reagents, and gas tests such as limewater, damp litmus paper, glowing splints, and burning splints.
Use three table columns:Reagent or test,Observation, andInference. Write the visible change first, then the ion or gas conclusion.
SEAB's 2026 O-Level Chemistry syllabus says the Notes for Qualitative Analysis are printed in Paper 3, but candidates cannot refer to notebooks, textbooks, or other information during the practical exam.
Quick O-Level Chemistry QA table
Use this first-pass table before planning the full sequence. The goal is not to memorise random colours; it is to write test / observation / inference in the same order every time.
| Test family | Reagent or test | Observation to look for | Typical inference |
| Cation | Add aqueous NaOH, then excess NaOH | White precipitate, soluble in excess | Aluminium or zinc ion possible |
| Cation | Add aqueous ammonia, then excess aqueous ammonia | Light blue precipitate, soluble in excess to form a deep blue solution | Copper(II) ion present |
| Cation | Add aqueous NaOH and warm | Gas turns damp red litmus paper blue | Ammonium ion present |
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Reviewed by
Azmi·Senior Chemistry Specialist
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