CBSE Class XII Chemistry Part 1 Question Bank Density & Coverage
This public board shows how the current source-safe PrepAI practice bank maps to chapter weights and official-format question types. It explains gaps before paper generation instead of claiming full mock readiness from an underfilled bank.
Local reviewed items
15
Strict target
33
Pilot chapters
5
Part 1 marks weight
36
Trust constraints
PrepAI shows how the study loop is constrained before asking for trust.
Source-safe
Official sources guide structure and coordinates; PrepAI content stays coordinate-based.
Deterministic tools
Chemistry calculators and paper compilation use local rules, not runtime AI guesses.
Answer-masked
Answers, explanations, and rubrics stay locked until the student commits a response.
Review-gated
Questions must pass content review before DPP, practice, assignment, or mock use.
Secure rendering
Formula rendering uses KaTeX with trust:false and unsafe math commands blocked.
Blueprint density grid
Chapter weights, type counts, and stop gates
| Chapter | Marks weight | Reviewed items | MCQ | SA / numerical | LA | Case | Gap | Action |
|---|---|---|---|---|---|---|---|---|
Solutions CBSE-12-CHEM-CH1 | 7 | 3/3 | 2 | 1 | 0 | 0 | Missing LA | Generate |
Electrochemistry CBSE-12-CHEM-CH2 | 9 | 3/3 | 2 | 1 | 0 | 0 | Missing LA | Generate |
Chemical Kinetics CBSE-12-CHEM-CH3 | 7 | 3/3 | 1 | 1 | 1 | 0 | Minimum types present | Generate |
d/f Block Elements CBSE-12-CHEM-CH4 | 7 | 3/3 | 1 | 1 | 1 | 0 | Minimum types present | Generate |
Coordination Compounds CBSE-12-CHEM-CH5 | 6 | 3/3 | 2 | 1 | 0 | 0 | Missing LA | Generate |
Strict blueprint stop gate
PrepAI can generate source-safe practice papers from the current bank, but it will not claim complete 70-mark readiness until content density, type coverage, source locators, answer keys, rubrics, and KaTeX review are verified.
Current gaps
- - 18 more reviewed questions needed for the 70-mark official-format target.
- - Missing official-format type coverage: case_based.
- - Chapter coverage gaps remain in Solutions, Electrochemistry, Coordination Compounds.
- - Review queue must verify source locator, answer, rubric, and KaTeX before full student mock readiness.
Turn coverage into practice.
Pick a chapter and generate an original paper from the reviewed local bank snapshot.