10+ Years Board Exam PYQs Decoded by AI | PrepOne
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10+ Years of Board Papers. Decoded by AI.

Don't just read the solutions. See which topics repeat every year, practice chapter-wise, and get your handwritten PYQ answers graded against the official board rubrics.

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  • 2014-2025 Solved Archive
  • Chapter-wise Weightage
  • Official Marking Rubrics
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10+years
2014-2025 solved archiveChapter-wise weightage94% recurrence

Know exactly what the examiner will ask.

We fed 5,000+ past year board questions into our AI engine to map the historical DNA of CBSE and Bihar Board exams. PrepOne highlights recurring micro-concepts that statistically carry up to 60% of paper weightage.

  • Predictive Weightage Engine

    "Ray Optics and Wave Optics have appeared in 9 out of the last 10 board exam sessions, carrying an average of 14 marks."

  • One-Tap Smart Filtering

    Filter 10+ years of papers by chapter, difficulty, bloom's taxonomy, or format (Objective vs Derivations).

Concept frequency tracker (example)

Class 12: Moving Charges & Magnetism

94% Recurrence
4M
15'
6M
16'
3M
17'
7M
18'
5M
19'
8M
20'
4M
21'
9M
22'
6M
23'
8M
24'

Historical marks distribution across CBSE Main & Compartment papers (2015-2024)

Interactive PYQ solver

Browse official board questions by subject and view predicted recurrences alongside marking schemes.

10+ Years PYQ Predictive Engine

Interactive Past Year Question Bank

2024 CBSE • Ray Optics

Board Solution & Step Rubric

94% High Recurrence

"A convex lens of focal length 20 cm is placed coaxially with a concave lens of focal length 10 cm at a distance of 10 cm. Find the position of the final image for an object at infinity."

Key Derivation / Formula:
1v1−1u1=1f1  ⟹  v1=+20 cm\frac{1}{v_1} - \frac{1}{u_1} = \frac{1}{f_1} \implies v_1 = +20\,\text{cm}
Intermediate Step:

Distance to concave lens=20−10=+10 cm (virtual object for 2nd lens)\text{Distance to concave lens} = 20 - 10 = +10\,\text{cm (virtual object for 2nd lens)}

Final Result:
1v2−1+10=−110  ⟹  1v2=0  ⟹  v2=∞\frac{1}{v_2} - \frac{1}{+10} = -\frac{1}{10} \implies \frac{1}{v_2} = 0 \implies v_2 = \infty
Official Board Examiner Rubric:1M for ray diagram + 2M for lens 1 image + 2M for final infinite position.

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Chapter-wise Deep Dive

Focus on one chapter at a time. Master all questions ever asked from 'Electrostatics' or 'Optics' across the last 10 years.

Year-wise Full Papers

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AutoScore integration

Graded by the official marking scheme.

If you write the 2022 board paper, our AI doesn't just guess your marks. It evaluates your handwritten answers against the exact step-marking rubric released by the board for that specific year.

  • Real board rubrics trained into the LLM
  • Step-marking for partial derivations
  • Detailed examiner commentary on your mistakes
2022 Physics Paper (example) Rubric match

1. Gauss's Law Statement

Matched official formula: ∮E⋅dA=qenclosedε0\oint \mathbf{E} \cdot d\mathbf{A} = \frac{q_{\text{enclosed}}}{\varepsilon_0}

+1 Mark

2. Mathematical Derivation

Missed integration limits ∫0R\int_{0}^{R} as per 2022 guidelines.

0 Marks

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