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Sublevo

ISC Class XII · Physics · Chemistry · Math

Master what the board actually tests.

The syllabus says what is examinable. It does not say where the marks go — and the board does not spread them evenly. Sublevo ranks every chapter by the marks CISCE has actually spent on it, counted off the real papers, and links every question back to the PDF it came from.

Open your dashboardSearch all questions
786
official board Qs
each linked to its CISCE PDF
1,722
labeled practice Qs
never passed off as board material
332
subtopics with notes
theory and traps, before you attempt
33
chapters
ranked by the marks the board spends

Pick a subject

Physics

PHY
  • Ray Optics~11.6 marks/paper
  • Magnetism~9 marks/paper
  • Electrostatics~8.2 marks/paper
10 chapters · 258 official · 2023–26

Chemistry

CHE
  • Solutions~9 marks/paper
  • Alcohols, Phenols and Ethers~8.5 marks/paper
  • Electrochemistry~8.3 marks/paper
10 chapters · 232 official · 2024–26

Math

MAT
  • Probability~13 marks/paper
  • Integrals~10 marks/paper
  • Determinants~8 marks/paper
13 chapters · 296 official · 2023–26

One real board question

Not a screenshot — this is the card every question in Sublevo renders as. Its source line is printed above the question, before you reveal anything: the year, the paper, the question number and the marks, with a link straight to the CISCE PDF so you can check us.

ISC 2025 · Paper 1 (Theory)·Q14·3 marks·PDF ↗

Write chemical equations to illustrate:

(i) Finkelstein reaction;

(ii) Williamson's synthesis;

(iii) Reimer-Tiemann reaction.

Open in context ↗

Official CISCE · Specimen · Competency bank · Practice — every question says which it is, on its face. Practice questions are labelled and never passed off as board material.

Theory, then attempt. Each subtopic opens with notes, the key formulas and the pitfalls examiners keep reporting — then questions hold their solution back until you reveal it, so you attempt before you check. What the badges and the colours mean →