Kerala Plus Two PCB Chapter Wise 2-Mark and 5-Mark Practice 2027 - Physics Chemistry Biology

In short: Kerala Plus Two exam papers have a specific section-wise structure: Section A (1-mark), B (2-mark), C (3-mark), D (5-mark), and E (numericals/problems). This guide provides focused practice sets for the two most scoring mark types — 2-mark and 5-mark questions — organized by chapter for Physics, Chemistry, and Biology. Master these specific question types to target 45+ marks out of 60 in each theory paper.

Kerala Plus Two Science Paper Design

Plus: 20 marks Continuous Evaluation (CE) + 20 marks Practical Evaluation (PE) = 100 total.

Sections B and D together carry 26 marks — nearly half of the terminal evaluation. The "answer any" choice format means you only need to prepare the best options per chapter, not every single question.

For Kerala Plus Two Physics chapter-wise weightage, see our detailed breakdown.

Why 2-Mark and 5-Mark Questions Matter Most

2-mark questions (Section B): You answer 8 out of 10 offered. These are the quickest to prepare and the most predictable. A well-prepared student can score 14-16 out of 16 marks here.

5-mark questions (Section D): You answer 2 out of 4. Each answer is a mini-essay or derivation. Getting both right gives you 10 marks — equivalent to ten 1-mark MCQs. The return on preparation time is the highest here.

Together, these two sections carry 26 marks. Add Section E numericals (8-10 marks) and you control 36 of 60 marks through targeted practice of just these question types.

Physics — 2-Mark Practice by Chapter

Electrostatics

• Define electric flux. Write its SI unit. (2 marks)
• State the principle of superposition of electric charges. (2 marks)
• What is an equipotential surface? Why is no work done in moving a charge along it? (2 marks)
• Define electric dipole moment. Write its SI unit. (2 marks)

Current Electricity

• State Kirchhoff's junction rule and loop rule. (2 marks)
• What is the principle of a Wheatstone bridge? Write the balance condition. (2 marks)
• Define drift velocity. How is it related to current? (2 marks)
• What is the difference between EMF and terminal voltage? (2 marks)

Magnetic Effects and EMI

• State Ampere's circuital law. (2 marks)
• What is electromagnetic induction? State Faraday's first law. (2 marks)
• Define self-inductance. Write the SI unit. (2 marks)
• What is eddy current? Give one application. (2 marks)

Optics

• Distinguish between interference and diffraction. (2 marks)
• State Brewster's law. Write the relation between Brewster angle and refractive index. (2 marks)
• What is total internal reflection? State the two conditions. (2 marks)

Modern Physics

• Define photoelectric effect. What is threshold frequency? (2 marks)
• Write de Broglie's hypothesis. Give the expression for de Broglie wavelength. (2 marks)
• What is radioactive decay? Define half-life. (2 marks)

Semiconductor

• What is a p-n junction? Explain forward bias briefly. (2 marks)
• Define amplification factor of a transistor. (2 marks)

Physics — 5-Mark Practice by Chapter

Electrostatics

• State and prove Gauss's theorem. Apply it to find the electric field due to a uniformly charged infinite plane sheet. (5 marks)
• Derive the expression for the capacitance of a parallel plate capacitor. What happens when a dielectric slab is inserted? (5 marks)

Current Electricity

• Explain the principle of a potentiometer. How is it used to compare the EMFs of two cells? Draw the circuit diagram. (5 marks)

Magnetism and EMI

• Derive the expression for force between two parallel current-carrying conductors. Define ampere. (5 marks)
• State Faraday's laws of electromagnetic induction. Derive the expression for EMF induced in a coil rotating in a uniform magnetic field. (5 marks)
• Derive the expression for impedance in a series LCR circuit. What is resonance? (5 marks)

Optics

• Explain Young's double slit experiment. Derive the expression for fringe width. What happens when the slit separation is increased? (5 marks)
• Derive the lens maker's formula starting from refraction at a single spherical surface. (5 marks)
• State Huygens' principle. Using it, verify Snell's law of refraction. (5 marks)

Modern Physics

• State the laws of photoelectric effect. Derive Einstein's photoelectric equation. Define stopping potential and threshold frequency. (5 marks)
• Explain Bohr's model of the hydrogen atom. Derive the expression for the radius of the nth orbit. (5 marks)

Semiconductor

• Explain the working of a p-n junction as a full-wave rectifier with circuit diagram and waveforms. (5 marks)

Chemistry — 2-Mark Practice by Chapter

Solutions

• Define molality and mole fraction. (2 marks)
• What is an ideal solution? Give one example. (2 marks)
• What is osmotic pressure? State Van't Hoff equation. (2 marks)

Electrochemistry

• Define molar conductivity. How does it vary with dilution? (2 marks)
• What is a galvanic cell? Write the cell notation for Daniell cell. (2 marks)
• State Faraday's first law of electrolysis. (2 marks)

Chemical Kinetics

• Define rate of reaction and rate constant. (2 marks)
• What is the order of a reaction? How is it different from molecularity? (2 marks)

d-Block and f-Block

• Why are transition metals coloured? (2 marks)
• What is lanthanoid contraction? Give one consequence. (2 marks)

Coordination Compounds

• Define coordination number and ligand. (2 marks)
• What is an ambidentate ligand? Give two examples. (2 marks)

Organic Chemistry

• Define nucleophilic substitution. Give one example. (2 marks)
• What is Markovnikov's rule? (2 marks)
• What is a peptide bond? How is it formed? (2 marks)
• Differentiate between DNA and RNA. (2 marks)

Chemistry — 5-Mark Practice by Chapter

Solutions

• State and explain Raoult's law. What are positive and negative deviations? Draw vapour pressure diagrams for both cases. (5 marks)
• Derive the relationship between relative lowering of vapour pressure and mole fraction for a non-volatile solute. (5 marks)

Electrochemistry

• Explain the variation of molar conductivity with concentration for strong and weak electrolytes. Draw graphs and give reasons. (5 marks)
• What is the Nernst equation? Derive it for a single electrode. Calculate the EMF of a given cell at non-standard conditions. (5 marks)

Chemical Kinetics

• Derive the integrated rate law for first-order reactions. Show that the half-life is independent of initial concentration. (5 marks)

Coordination Compounds

• Explain crystal field theory for octahedral complexes. What is crystal field splitting energy? Why are some complexes coloured? (5 marks)

Organic Chemistry

• Explain SN1 and SN2 mechanisms with examples and stereochemical outcomes. (5 marks)
• Describe the methods of preparation of alcohols and phenols. Explain why phenol is more acidic than ethanol. (5 marks)
• Explain the mechanism of aldol condensation with an example. What is a Cannizzaro reaction? (5 marks)
• What are amino acids? Classify them. Explain the primary and secondary structures of proteins. (5 marks)

Biology — 2-Mark Practice by Chapter

Reproduction

• What is double fertilisation? Why is it unique to angiosperms? (2 marks)
• Define parthenocarpy. Give one example. (2 marks)
• What is in vitro fertilisation? When is it used? (2 marks)

Genetics

• State Mendel's law of segregation. (2 marks)
• What is a test cross? Why is it performed? (2 marks)
• Define codominance. Give one example. (2 marks)

Molecular Biology

• What are restriction enzymes? Give one example. (2 marks)
• Define gene therapy. Give one successful example. (2 marks)
• What is PCR? Write its three steps. (2 marks)

Evolution

• What are homologous organs? Give two examples. (2 marks)
• Define genetic drift. How does it differ from natural selection? (2 marks)

Ecology

• Define an ecosystem. What is a food web? (2 marks)
• What is biomagnification? Give one example. (2 marks)

Human Physiology

• What is dialysis? When is it necessary? (2 marks)
• Define cardiac output. What is its normal value? (2 marks)

Biology — 5-Mark Practice by Chapter

Reproduction

• Describe the structure of a mature embryo sac. Explain the events of double fertilisation and triple fusion. Draw a labelled diagram. (5 marks)
• Describe microsporogenesis. Draw a labelled diagram of a mature pollen grain. (5 marks)
• Describe the human female reproductive system. Explain the menstrual cycle with its phases. (5 marks)

Genetics and Molecular Biology

• Explain the Hershey-Chase experiment. How did it prove DNA is the genetic material? (5 marks)
• Describe the process of transcription in eukaryotes. What is RNA splicing? (5 marks)
• Explain the lac operon model of gene regulation with a labelled diagram. (5 marks)
• Explain Mendel's law of independent assortment using a dihybrid cross. Show the 9:3:3:1 ratio. (5 marks)

Evolution

• What are the evidences of evolution? Explain with reference to morphological, anatomical, and molecular evidence. (5 marks)

Biotechnology

• Describe the process of recombinant DNA technology. What are the tools required? Draw a flowchart. (5 marks)

Ecology

• Describe the energy flow in an ecosystem with a diagram. Explain the 10% law. What are ecological pyramids? (5 marks)
• What is ecological succession? Differentiate between primary and secondary succession with examples. (5 marks)

How to Practice Mark-Type-Specific Questions

The key insight: practise writing answers in the exact word count each mark type demands.

For 2-mark questions: write the definition and add ONE supporting sentence. Do not over-elaborate.

For 5-mark questions: always include a diagram if the topic allows it. Use subheadings within your answer. Conclude with a summary sentence.

Last 30 Days Study Plan

Frequently Asked Questions

Why focus on 2-mark and 5-mark specifically?

These two sections together carry 26 out of 60 terminal evaluation marks. They have the most predictable patterns and the best marks-to-effort ratio. Section A (MCQs) also matters but requires different preparation style.

Does Kerala Plus Two follow NCERT?

Kerala uses SCERT textbooks. While there is overlap with NCERT, several topics and their treatment differ. Always use your SCERT textbook as the primary source. NCERT can supplement for NEET preparation.

How does the choice system work in Sections B, C, and D?

You get more questions than you need to answer. For example, 10 questions in Section B but answer only 8. This means you can skip your weakest 2 topics entirely and still score full marks.

What is the role of continuous evaluation in final marks?

CE carries 20 marks based on classroom tests, assignments, and projects. Most students score 14-18 here. The terminal evaluation (60 marks) is where targeted preparation makes the biggest difference.

Should I practise 3-mark questions too?

Yes, but 3-mark questions (Section C) are essentially "slightly longer 2-mark answers." If you master the 2-mark and 5-mark types, you can handle 3-mark questions by adjusting depth slightly. Smart study approaches help you manage time.

How many questions should I practise per chapter?

Aim for at least 5 questions of each mark type per chapter. That gives you enough variety to handle any variation in the actual paper.

Related Guides

• Kerala Plus Two Physics Chapter Wise Weightage
• Kerala SSLC Class 10 Important Questions
• Kerala Board Class 10 Science Weightage
• Board Exam Answer Writing Strategy
• Board Exam Time Management Strategy
• Fear of Failing Board Exams — Anxiety Management

Start Mark-Type Practice on Padhaao

Chapter-wise practice matching Kerala's paper design. AI feedback on answer quality. 3 free chapters daily.

Start Plus Two PCB practice on Padhaao →