Class 12 & entrance exams · BoardPrep blog
How to Score 90%+ in CBSE Class 12 PCB (Physics, Chemistry, Biology)
How to score 90%+ in Class 12 PCB boards, covering high-weightage chapters, Biology diagrams and answer-writing, and a routine that works alongside NEET.
For PCB students, the NCERT overlap with NEET is a big advantage. The board-specific skill to build is written answers, with diagrams and key terms.
Biology: where the marks are
| Chapter | Avg marks per paper | Share |
|---|---|---|
| Molecular Basis of Inheritance | 11.2 | 17% |
| Reproductive Health | 10.6 | 16% |
| Human Health & Disease | 8.2 | 13% |
| Sexual Reproduction in Flowering Plants | 6.8 | 10% |
| Principles of Inheritance | 6.0 | 9% |
Averaged across 8 CBSE Class 12 Biology board papers, 2023–2026. All chapters
Biology answer habits
- use NCERT terminology exactly
- draw labelled diagrams wherever relevant: they often earn marks of their own
- for "differentiate" questions, use a table with matched points
Physics and Chemistry
- Physics: derivations, numericals with units, ray diagrams. Important derivations
- Chemistry: reactions, reasoning questions and coordination compound nomenclature. Named reactions
Routine
Through the year, NEET MCQs on most days plus one board-writing session a week. From mid-January, mostly full board papers.
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