MP Board Class 12 Chemistry Important Questions 2027 | Chapter-wise
Are you preparing for the MP Board Class 12 Chemistry board exam 2027 and looking for the most important questions that can help you score high marks? Chemistry in Class 12 is divided into Physical Chemistry, Organic Chemistry, and Inorganic Chemistry — each with its own set of high-weightage topics. This comprehensive guide compiles the most frequently asked questions from previous year papers, chapter-wise important topics, numerical problem types, name reactions, and expert preparation tips. Whether you are revising NCERT Chemistry or solving MP Board sample papers, this blog will serve as your ultimate question bank for scoring 80+ in the board exam.
📖 Table of Contents
🧊 Solid State — Important Questions
The Solid State chapter carries 8–10 marks in the MP Board exam. Questions from this chapter are usually theoretical with some numerical problems. Here are the most important questions you must practice:
🧪 Solutions & Colligative Properties
Solutions is a high-weightage chapter (10–12 marks) with both theory and numerical questions. Colligative properties, Raoult’s law, and Van’t Hoff factor are frequently tested.
📌 Most Repeated Questions
⚡ Electrochemistry — Numericals
Electrochemistry is a 12–14 marks chapter filled with numerical problems on Nernst equation, conductivity, and Faraday’s laws. Master these key questions:
- Nernst Equation: Derive and calculate emf of cells. E = E° − (RT/nF) ln Q — asked every year (5 marks)
- Conductivity & Molar Conductivity: Define and distinguish. Calculate molar conductivity from given data. 2022, 2024, 2025
- Faraday’s Laws: State first and second laws. Calculate mass of metal deposited. 2020, 2023, 2025
- Kohlrausch’s Law: Define and apply to calculate limiting molar conductivity of weak electrolytes. 2021, 2024
- Battery Types: Distinguish between primary and secondary batteries. Explain lead-acid battery. 2022, 2023, 2025
- Corrosion: Explain rusting of iron with electrochemical theory. 2020, 2024
💡 Pro Tip for Electrochemistry Numericals
Always write the Nernst equation in your answer first — even if you’re unsure of the exact calculation, writing the formula earns partial marks. Convert all concentrations to mol/L (M) and temperatures to Kelvin (298K is standard). Practice at least 10 numericals from NCERT Examples (Chapter 3) — MP Board repeats them frequently.
⏱️ Chemical Kinetics — Key Problems
Chemical Kinetics covers 8–10 marks with rate laws, order of reactions, and activation energy being the main focus areas. Here are the most important question types:
🧬 Organic Chemistry — Name Reactions
Organic Chemistry contributes 25–30 marks in the MP Board Class 12 exam. Name reactions are the most scoring part — memorize the mechanism, conditions, and products carefully:
🔑 Must-Know Name Reactions
🧫 Biomolecules & Polymers
Biomolecules and Polymers together account for 10–12 marks. These are largely theoretical but require careful memorization of structures and classifications.
📌 Key Questions from Biomolecules
- Define carbohydrates. Classify them with examples and structures. (5 marks — 2021, 2023, 2025)
- Write the structure of glucose and explain its reactions — acetylation, oxidation to gluconic/saccharic acid. (4 marks — 2020, 2022, 2024)
- What are proteins? Explain primary, secondary, tertiary, and quaternary structures. (5 marks — every year)
- Explain the peptide bond formation. How are enzymes different from ordinary catalysts? (3 marks — 2022, 2025)
- What are vitamins? Classify as fat-soluble and water-soluble with examples. (3 marks — 2020, 2023, 2024)
- Define polymers. Classify based on source — natural, semi-synthetic, synthetic. (3 marks — 2021, 2023, 2025)
- Explain addition and condensation polymerization with examples (Polythene, Nylon-66, Terylene). (5 marks — every year)
- What is the difference between thermoplastic and thermosetting polymers? Give examples. (3 marks — 2020, 2022, 2024)
📊 Numerical Problems — Step-by-Step Solutions
Numerical problems carry 15–20 marks in the Chemistry paper. Here are sample problems with step-by-step solutions following the MP Board marking scheme:
Example 1: Solutions (3 marks)
Q: Calculate the boiling point of a solution containing 6g of urea (M=60 g/mol) dissolved in 200g of water. (Kb of water = 0.52 K kg mol⁻¹)
Solution:
Step 1: Calculate moles of urea = 6/60 = 0.1 mol
Step 2: Mass of water in kg = 200/1000 = 0.2 kg
Step 3: Molality (m) = moles/kg = 0.1/0.2 = 0.5 m
Step 4: ΔTb = Kb × m = 0.52 × 0.5 = 0.26 K
Step 5: Boiling point = 100 + 0.26 = 100.26°C
Example 2: Chemical Kinetics (3 marks)
Q: A first-order reaction is 50% complete in 40 minutes. Find the time for 90% completion.
Solution:
Step 1: For first order, k = 0.693/t₁/₂ = 0.693/40 = 0.017325 min⁻¹
Step 2: For 90% completion, [A]₀ = 100, [A] = 10
Step 3: t = (2.303/k) log([A]₀/[A]) = (2.303/0.017325) × log(10)
Step 4: t = 132.9 × 1 = 132.9 minutes
Example 3: Electrochemistry (4 marks)
Q: Calculate the emf of the cell: Zn(s) | Zn²⁺ (0.1M) || Cu²⁺ (0.01M) | Cu(s). Given E°(Zn²⁺/Zn) = -0.76V, E°(Cu²⁺/Cu) = +0.34V
Solution:
Step 1: Cell reaction: Zn + Cu²⁺ → Zn²⁺ + Cu
Step 2: E°cell = E°cathode − E°anode = 0.34 − (−0.76) = 1.10 V
Step 3: n = 2 (2 electrons transferred)
Step 4: Nernst equation: E = E° − (0.0591/n) log([Zn²⁺]/[Cu²⁺])
Step 5: E = 1.10 − (0.0591/2) log(0.1/0.01) = 1.10 − 0.02955 × log(10)
Step 6: E = 1.10 − 0.02955 = 1.07045 V
🎯 Expert Tips for 80+ Marks in Chemistry
Scoring 80+ in MP Board Class 12 Chemistry is achievable with smart preparation. Follow these expert strategies:
💡 Final Tip: The 30-30-30 Revision Method
To retain all 16 chapters effectively, follow this routine: 30 minutes every morning — revise name reactions from Organic Chemistry, 30 minutes every evening — solve numerical problems from Physical Chemistry, and 30 minutes before bed — read Inorganic Chemistry (coordination compounds, d-block elements). This balanced approach ensures no portion is left weak. Combine this with one previous year paper every weekend, and 80+ marks in Chemistry are guaranteed!