BIEK Intermediate (HSC) Chemistry (Papers I and II): syllabus, papers and marking
Each 85-mark paper: 17 OMR MCQs, any 9 short answers and any 4 detailed answers, with Paper II split between inorganic and organic.
BIEK Model Paper 2026 (new book) · Annual series · grades A++ to U (IBCC scale)
BIEK Chemistry: where the marks go
BIEK sets Intermediate Chemistry as two 85-mark papers: 17 OMR MCQs in 20 minutes, any 9 short questions at 4 marks (36) and any 4 detailed questions at 8 marks (32). The 2026 model paper (new book) mixes numericals and theory: limiting reactants, Pauli and Hund, a molecular-orbital diagram, pH, rate law and Ksp in Paper I, then flame tests, complex-ion naming, polymers, greenhouse gases and organic reactions in Paper II.
Paper II splits its short section into four inorganic or general questions and five organic ones, so both halves of the course need preparing. Marks go on balanced equations, correct IUPAC names and complete mechanisms. Our papers copy the model paper’s section structure.
Paper structure and what we mark
| Paper | Time | Marks | Weight | Questions |
|---|---|---|---|---|
| Section A — Multiple Choice (each paper) | 20 min | 17 | 20% | 17 MCQs on an OMR sheet, 1 mark each, all compulsory |
| Section B — Short Answers (each paper) | 2 h 40 min (B and C) | 36 | 42% | Answer any 9 part questions, 4 marks each |
| Section C — Detailed Answers (each paper) | — | 32 | 38% | Answer any 4 questions, 8 marks each (Paper II: two Inorganic/General, two Organic) |
Syllabus outline
- Paper I topics seen in the 2026 model paper: stoichiometry; atomic structure and quantum rules; molecular orbitals; liquids and solids (surface tension, unit cells); solutions and pH; chemical kinetics; ionic equilibrium and solubility product
- Paper II topics seen in the 2026 model paper: s-, p- and d-block elements; complex ions and their names; polymers; green-house gases; mass spectroscopy; organic chemistry (hydrocarbons, ozonolysis, alcohols and further functional groups)
How each paper is marked here
- The seventeen MCQs in each paper are scored automatically against the key.
- Short answers are marked on the key idea and the reason; either-or options are marked as the one chosen.
- Detailed answers are marked step by step, with equations and mechanisms credited line by line.
Where BIEK Chemistry candidates lose marks
- Equation not balanced, or state symbols missing — A correct reaction with the wrong coefficients loses the mark; balance first, then add (s), (l), (g) or (aq) where the question asks for them.
- Mole calculation with the wrong molar mass — Stoichiometry answers fail at the first step when the molar mass is added up wrongly; the rest of the working then cannot earn its marks.
- Definition that names the example, not the idea — Terms such as electronegativity, ionisation energy, equilibrium constant or isotope need the property itself; an example alone is not enough.
- Organic reactions with the wrong conditions — Naming the product but leaving out the reagent, catalyst or temperature (for example for dehydration or hydrogenation) is a standard half-mark loss.
- Trends stated without the reason — Periodic-table questions ask for the trend and the reason (shielding, nuclear charge, size); the trend alone earns half.
Sample papers, mark schemes and marked reports for BIEK Chemistry
See a real handwritten script marked by eight examiners at admitportfolio.com/examiners.
Questions teachers ask
- How is Paper II’s short section split?
- Four part questions from Inorganic and General chemistry and five from Organic, as the model paper instructs.
- Is the practical marked?
- No. The scheme of studies gives Chemistry 85 theory plus 15 practical marks a year; we mark the theory papers.
- Is this official BIEK marking?
- No. Board of Intermediate Education Karachi marks the real exam. This is examiner-style marking of mocks and homework for BIEK Chemistry. Only you see the marking, and you decide what reaches the student.
- Do you reproduce past-paper questions?
- No. Every Papers I and II paper here is original and written to the biek model paper 2026 (new book), in the same structure as the real papers shown above.
- Which papers are marked?
- None yet are marked question by question; Section A are scored instantly. Practical exams sat at the centre are not marked here.
- How is the next paper chosen?
- From the marks a student lost: the concepts behind them are ranked by marks dropped, and the new paper weights those topics. It is the same syllabus and structure, with new questions.
- When are the exams?
- Annual series. Grades A++ to U (IBCC scale).