: Ion exchange reactions and redox (oxidation-reduction) reactions.
Diagnostic chemistry assessments for 9th-grade students scheduled for typically refer to training works from the StatGrad system or regional diagnostic monitors (e.g., MCKO or regional education quality centers). 9 klass diagnosticheskajaja po himii 29 nojabrja otvety
If you are looking for the exact "Option 29 November" papers, they are usually published on educational portals immediately after the official testing window closes. You can check these resources: 9 klass diagnosticheskajaja po himii 29 nojabrja otvety