Bihar Board Class 12th Chemistry Mock Test 2027: Free Online Test, 35 Objective Pattern & Model Paper Practice
Executive Examination Summary
| Examination Feature | Official BSEB Class 12 Specification |
|---|---|
| Exam Name | Bihar School Examination Board (BSEB) Intermediate Annual Examination (I.Sc) |
| Subject | Chemistry (रसायन विज्ञान) — Subject Code: 118 |
| Target Academic Session | 2026–2027 Examination Cycle (February 2027) |
| Total Marks | 100 Marks (70 Marks Theory Written Exam + 30 Marks School Practical) |
| Exam Duration | 3 Hours 15 Minutes (195 Minutes total, includes 15 minutes cool-off reading time) |
| Question Paper Layout | Section A (Objective MCQs) + Section B (Subjective Short and Long Answer Questions) |
| Section A: Objective Questions | 70 Multiple Choice Questions provided; candidates must answer any 35 on the OMR sheet |
| Section A Marks | 35 Marks (1 Mark for each correct answer) |
| Negative Marking | Zero (0) Penalty — No marks deducted for wrong answers |
| Section B: Short Answer Questions | 20 Questions given; candidates answer any 10 (2 Marks each = 20 Marks) |
| Section B: Long Answer Questions | 6 Questions given; candidates answer any 3 (5 Marks each = 15 Marks) |
| Passing Marks (Theory) | Minimum 21 Marks out of 70 (30% passing rule) |
| Passing Marks (Practical) | Minimum 12 Marks out of 30 (40% passing rule) |
| Minimum Aggregate to Pass | Minimum 33 Marks out of 100 overall (Theory and Practical combined) |
| Medium of Exam | Bilingual (Questions printed side-by-side in Hindi and English) |
Chemistry is one of the most critical subjects for Bihar Board Class 12 Science students. It holds equal weight whether you are in the Mathematics (PCM) or Biology (PCB) group. A high score in Chemistry can easily lift your overall score past the 300-mark mark needed for a prestigious First Division. On the other hand, scoring poorly here pulls down your total percentage, even if your other subjects are strong.
The Bihar Board Chemistry paper offers students a distinct advantage: you receive double the questions you actually need to solve. In Section A, the board provides 70 objective multiple-choice questions. You only need to answer 35 of them on your OMR sheet. This lets you skip unfamiliar questions and focus entirely on the concepts you know best.
However, having 70 options also creates a serious challenge: question selection speed. Many Inter Science students spend 45 minutes simply reading through the options. They become indecisive, second-guess their answers, and end up rushing to fill their OMR bubbles. When you rush, you risk making careless mistakes or misaligning your answer rows.
Practicing regularly with our bihar board class 12th chemistry mock test 2027 trains your brain to handle this format. You learn to spot direct formula questions in Physical Chemistry, identify familiar coordination compounds in Inorganic Chemistry, and solve Organic named reactions within seconds.
Start Bihar Board Class 12th Chemistry Mock Test 2027 Online
Test your knowledge with an authentic 35-mark objective test built around official BSEB guidelines. Benefit from real-time scoring, chemical reaction steps, and state-wide rank comparisons.
- Free Access Tier: 2 Full-Length 70-Question Tests + All Chapter Tests Free
- OMR Simulation Rules: Choose and submit your best 35 questions out of 70
- Languages Supported: Hindi Medium (हिंदी माध्यम) & English Medium
- Features Included: Branch Accuracy Heatmap, Named Reaction Helper, Step-by-Step Solutions
Start Bihar Board Class 12th Chemistry Mock Test 2027 Online
Official Updates and Bihar Board Class 12 Examination Status
The Bihar School Examination Board (BSEB), administered under the leadership of Chairman Anand Kishore from Sinha Library Road in Patna, manages the annual Intermediate examinations. Keep track of verified dates for the 2027 cycle below:
| Examination Event | Expected Official Timeline | Current Verification Status | Official Verification Portal |
|---|---|---|---|
| Inter Science Student Registration | September – October 2026 | School Headmaster Filing | seniorsecondary.biharboardonline.com |
| Dummy Admit Card Verification | November 2026 | Name, photo, and subject correction | BSEB Senior Secondary Portal |
| Sent-Up (Pre-Board) Practical Exams | Late November 2026 | Conducted at home schools | School Notice Boards |
| Sent-Up (Pre-Board) Theory Exams | Early December 2026 | Mandatory state-wide screening | High School Exam Centers |
| Official Model Papers (PDF Release) | Late December 2026 | Annual sample paper download | biharboardonline.bihar.gov.in |
| Practical Examination Admit Card | Late December 2026 | Required for home school lab tests | School Principal Login |
| Class 12 Practical Examinations | January 10 to January 20, 2027 | External examiner evaluation | Respective School Labs |
| Final Theory Admit Card Release | Third Week of January 2027 | Distributed with official school seal | Designated School Counters |
| Class 12 Chemistry Theory Exam Date | Early February 2027 (Tentative: Feb 1–5) | Official BSEB Annual Routine | Official BSEB Press Release |
| BSEB Inter Annual Result 2027 | Late March 2027 (Before March 31) | Online Marksheet Portal | results.biharboardonline.com |
Educational Notice: The practice materials and test simulations provided on this platform are independently developed by defense and school educators. This platform operates independently of the Bihar School Examination Board (BSEB).
The 70 vs 35 Objective Rule Explained: Avoid This Critical OMR Mistake
The most common error on the Bihar Board Class 12 Chemistry exam is failing to understand how the optical scanning machine evaluates Section A.
When you sit for the exam, Section A of your paper contains 70 objective questions numbered from 1 to 70. You are instructed to answer any 35 of them. However, many students believe that if they mark 45 or 50 bubbles, the board will evaluate all of them and pick the highest 35 scores.
This is completely incorrect.
The automated OMR optical scanner reads your answer sheet from top to bottom, beginning at question 1. The moment the scanner detects 35 marked bubbles, it stops evaluating. Any bubbles marked after the 35th bubble are completely ignored.
Consider this example:
- A student marks 45 bubbles on their sheet.
- Among the first 35 marked bubbles, they get 25 correct and 10 incorrect.
- Questions 36 through 45 are all correct.
- The optical scanner registers a score of 25 out of 35. It never evaluates questions 36 through 45.
This is why practicing on our bseb class 12 chemistry 70 objective questions mock test free platform is so important. Our testing software alerts you the moment you attempt to mark a 36th question, helping you build the discipline needed to choose and answer only your best 35 questions on exam day.
What Most Free Online Tests Miss: Competitor Gap Analysis
Many websites in Bihar offer online quizzes for Class 12 Chemistry, but most of these free resources have significant shortcomings. The table below outlines what most platforms miss and how our platform provides a complete preparation experience:
| Feature / Preparation Need | What Most Free Websites Offer | How Our Testing Platform Solves It | Direct Benefit to You |
|---|---|---|---|
| OMR Exam Simulation | Short 10 to 15 question generic quizzes | Full 70-question pools where you select your best 35 answers | Replicates the actual exam room format and decision-making process |
| OMR Evaluation Limit | Allows unlimited question submissions | Enforces a strict 35-question cap with instant alerts | Prevents you from losing marks to the optical scanner cutoff rule |
| Organic Chemistry Focus | Mixed questions without separate reaction drills | Dedicated Named Reaction and Distinction Test practice modules | Helps you master the section carrying nearly 45% of total theory marks |
| Explanation Quality | Shows only the correct option letter (A, B, C, or D) | Step-by-step chemical equations, reagents, and numerical steps | Teaches you why an answer is right so you remember the underlying rule |
| Diagnostic Feedback | Basic percentage score shown at the end | Branch-wise accuracy heatmaps for Physical, Inorganic, and Organic | Highlights your exact weak areas so you know what to revise next |
| Bilingual Language Toggle | Often English-only or poorly translated Hindi | Clear, verified side-by-side Hindi and English translations | Lets Hindi and English medium students practice with confidence |
Complete Branch-Wise Marks Distribution: Physical, Inorganic & Organic
The BSEB Class 12 Chemistry syllabus follows the NCERT and SCERT Bihar curriculum, dividing the 10 theory chapters into three core branches. The table below outlines their question distribution and weightage across recent board papers:
| Chemistry Branch | NCERT Chapters Included | Estimated Objective Questions (Out of 70) | Estimated Subjective Marks (Out of 35) | Total Theory Marks Share (Out of 70) | Priority Level |
|---|---|---|---|---|---|
| Organic Chemistry (कार्बनिक रसायन) | Chapters 6, 7, 8, 9, and 10 | 28 – 32 Questions | 14 – 16 Marks | ~30 Marks | Highest Priority |
| Physical Chemistry (भौतिक रसायन) | Chapters 1, 2, and 3 | 22 – 25 Questions | 12 – 14 Marks | ~24 Marks | High Priority (Formulas) |
| Inorganic Chemistry (अकार्बनिक रसायन) | Chapters 4 and 5 | 15 – 18 Questions | 8 – 10 Marks | ~16 Marks | High Scoring (Direct Memory) |
Detailed Micro-Syllabus Breakdown: Branch by Branch
Review this micro-syllabus to track and master every specific topic across the three branches of Chemistry:
Unit 1: Physical Chemistry (भौतिक रसायन)
Estimated Theory Weightage: 22 to 25 Objective Questions, ~24 Total Marks
Chapter 1: Solutions (विलयन):
Micro-Topics: Types of solutions, expression of concentration (Molarity, Molality, Mole Fraction, Parts Per Million), Henry's Law of gas solubility, Raoult's Law for volatile and non-volatile solutes, Ideal and Non-Ideal solutions, Positive and Negative deviations from Raoult's law, Azeotropic mixtures.
Colligative Properties: Relative lowering of vapor pressure, Elevation of boiling point (ΔTb = Kb ⋅ m), Depression of freezing point (ΔTf = Kf ⋅ m), Osmotic pressure (Π = CRT), Abnormal molar mass, van 't Hoff factor (i).
Key Formula to Remember:
Chapter 2: Electrochemistry (विद्युत रसायन):
Micro-Topics: Redox reactions, Galvanic cells, Daniel cell, Electrolytic cells, Standard Hydrogen Electrode (SHE), Nernst Equation for cell potential, the relationship between EMF and Gibbs Free Energy (ΔG° = −nFE°_cell), specific conductance (κ), and molar conductivity (Λm). Laws and Storage: Kohlrausch's Law of independent migration of ions, Faraday's First and Second Laws of electrolysis (W = ZIt), primary batteries (dry cell), secondary batteries (charging and discharging reactions of lead storage battery), hydrogen-oxygen fuel cells, and corrosion along with methods of preventing it.
Key Formula to Remember:
Chapter 3: Chemical Kinetics (रासायनिक बलगतिकी):
Micro-Topics: Rate of reaction (average and instantaneous), factors affecting the rate (concentration, temperature, catalyst), rate law, the difference between order of reaction and molecularity of reaction.
Rate Equations: Integrated rate equations for zero-order and first-order reactions, half-life period (t1/2), pseudo first-order reactions, basic principles of collision theory, the Arrhenius equation, and activation energy (Ea).
Key Formula to Remember:
Unit 2: Inorganic Chemistry (अकार्बनिक रसायन)
Estimated Theory Weightage: 15 to 18 objective questions, approximately 16 total marks.
Chapter 4: The d- and f-Block Elements (d- एवं f-ब्लॉक के तत्व):
Micro-Topics: General electronic configuration of transition elements ((n−1)d^1-10 ns^1-2), trends in metallic properties, atomic and ionic radii, variable oxidation states (explanation of why manganese shows up to +7 oxidation state), catalytic properties, formation of coloured ions (due to d-d transitions), magnetic properties (spin-only magnetic moment formula: μ = √(n(n+2)) BM, where n is the number of unpaired electrons), and the formation of interstitial compounds.
Lanthanoids and Actinoids: Lanthanoid contraction (causes and its chemical consequences on the 4d and 5d elements such as zirconium and hafnium which have nearly identical radii), oxidation states, and a comparison of actinoid contraction.
Important Compounds: Preparation, properties, and oxidising actions of potassium dichromate (K2Cr2O7) and potassium permanganate (KMnO4).
Chapter 5: Coordination Compounds (उपसहसंयोजन यौगिक):
Micro-Topics: Werner's Coordination Theory (primary valency versus secondary valency), definitions of terms: coordination entity, central atom, ligands (monodentate, bidentate, ambidentate, and polydentate such as EDTA^4−), coordination number, coordination sphere, and oxidation number.
Nomenclature & Bonding: Systematic IUPAC nomenclature of mononuclear coordination complexes, isomerism (structural isomerism: ionization, hydrate, linkage, coordination; stereoisomerism: geometrical cis/trans and optical isomerism), Valence Bond Theory (VBT: hybridisation, inner orbital complexes versus outer orbital complexes, magnetic behaviour), and Crystal Field Theory (CFT: crystal field splitting in octahedral and tetrahedral complexes, spectrochemical series, strong field ligands versus weak field ligands).
Unit 3: Organic Chemistry (कार्बनिक रसायन)
Estimated Theory Weightage: 28 to 32 objective questions, about 30 total marks (the highest scoring branch).
Chapter 6: Haloalkanes and Haloarenes (हैलोएल्केन तथा हैलोएरीन):
Micro-Topics: Nomenclature, nature of the C-X bond, nucleophilic substitution mechanisms (comparison between SN1 and SN2: order of reactivity, inversion versus racemization), elimination reactions (Saytzeff's Rule), reactions with metals (formation of Grignard reagents), electrophilic substitution reactions of haloarenes, and the environmental effects of chloroform, iodoform, freons, and DDT.
Chapter 7: Alcohols, Phenols and Ethers (ऐल्कोहॉल, फीनॉल एवं ईथर):
Micro-Topics: Classification of mono-, di-, and tri-hydric alcohols, industrial preparation, acidic nature of alcohols and phenols (explanation of why phenol is more acidic than ethanol), electrophilic aromatic substitution of phenols (nitration, bromination with bromine water giving 2,4,6-tribromophenol), preparation of ethers by dehydration of alcohols and by Williamson synthesis, and cleavage of the C-O bond in ethers with HI.
ChapterChecklist for Tests to Identify Key Chemical Differences
Lucas Test (to distinguish between primary (1°), secondary (2°), and tertiary (3°) alcohols):
Reagent: An equimolar mixture of anhydrous zinc chloride and concentrated hydrochloric acid (ZnCl2 + conc. HCl).
Observation: Tertiary (3°) alcohols cause immediate turbidity or cloudiness; secondary (2°) alcohols show turbidity after 5 minutes; primary (1°) alcohols do not produce turbidity at room temperature and require heating.
Tollens' Test (the silver mirror test for aldehydes):
Reagent: An ammoniacal solution of silver nitrate ([Ag(NH3)2]+OH−).
Observation: Aldehydes reduce Tollens' reagent to produce a shiny silver mirror on the inner surfaces of the test tube; ketones do not react in the Tollens' test.
Fehling's Test:
Reagent: A mixture of Fehling's A (aqueous CuSO4) and Fehling's B (alkaline sodium potassium tartrate / Rochelle salt).
Observation: Aliphatic aldehydes reduce the blue alkaline copper solution to a red precipitate of cuprous oxide (Cu2O); aromatic aldehydes and ketones do not react.
Carbylamine Test (the isocyanide test for primary amines):
Reagent: Chloroform (CHCl3) and ethanolic potassium hydroxide (KOH).
Observation: Both aliphatic and aromatic primary (1°) amines give off a very unpleasant odour of isocyanide (carbylamine); secondary and tertiary amines show no reaction.
Iodoform Test (for compounds containing the CH3−C=O or CH3−CH(OH)− groups):
Reagent: Iodine and sodium hydroxide (I2 + NaOH).
Observation: Compounds that have an acetyl or methyl carbinol group form a bright yellow crystalline precipitate of iodoform (CHI3) and have a distinct antiseptic smell.
Analysis of Previous Year Questions (PYQ) Trend
An examination of the BSEB Intermediate Chemistry exam papers from 2021 to 2026 shows a clear distribution of question types:
| Question Style Bracket | Share in 70 Objectives | What It Primarily Evaluates | Recommended Solving Strategy |
|---|---|---|---|
| Direct Recall & Fact Matching | 35 Questions | IUPAC names, oxidation numbers, definitions, catalyst names, and vitamin deficiency diseases. | Tackle these first since the 35 questions can be answered in just 20 minutes without requiring any complex calculations. |
| Direct Formula & Numerical Units | 20 Questions | The units of rate constants (k), the van 't Hoff factor values, Faraday's constant, and coordination numbers. | Do these if you need more answers to reach your target of 35. |
| Multi-Step Reagent Sequences | 15 Questions | Multi-step organic conversions, complex electrochemical calculations, and detailed mechanism paths. | Omit these in Section A because you only need to answer 35 out of the 70 questions; therefore, it's better to focus on the direct, single-step questions. |
How many objective questions are asked in the Bihar Board 12th Chemistry exam?
In the Bihar Board Class 12 Chemistry exam, Section-A consists of a total of 70 objective MCQs. Candidates are required to attempt any 35 of these on the OMR sheet. Each question is worth 1 mark, so Section-A carries a total of 35 marks.
Is there negative marking in the Bihar Board Class 12 Chemistry exam?
No, there is no negative marking. Students get 1 mark for each correct answer and 0 marks for incorrect or unattempted questions. Therefore, it is advisable to attempt all 35 of the allowed objective questions without leaving any blank.
What happens if a student attempts more than 35 objective questions in Chemistry?
The computer scanner used automatically considers only the first 35 responses in order; all answers marked from the 36th bubble and beyond are completely ignored, even if they are correct.
What are the passing marks in Bihar Board 12th Chemistry?
In order to pass the Bihar Board Class 12 Chemistry exam, a student must obtain at least 21 marks out of 70 in the theory portion (30%) and at least 12 marks out of 30 in the practical (40%), with a total aggregate of at least 33 out of 100 to be considered passed.
Which branch of Chemistry has the highest marks weightage in the BSEB Class 12 exam?
Organic Chemistry has the highest weightage, amounting to between 28 and 32 marks out of the 70 in the theory paper. Physical Chemistry accounts for 22 to 25 marks, and Inorganic Chemistry accounts for 15 to 18 marks.
Built-in Platform Features & AI-Based Weak Area Diagnostics
The practice engine on sarkarimocktest.com offers students real-time diagnostic tools:
- Branch-Wise Accuracy Analytics: Examine your performance in Physical, Inorganic, and Organic Chemistry separately. This will help you find out whether your mistakes are due to formula errors or to having forgotten the reaction conditions.
- Time-Per-Question Diagnostics: Monitor the average number of seconds spent on each question. If a question takes more than 60 seconds, the system will flag it so you can work on solving it more quickly.
- All India Rank & State Percentile: Compare your score with those of Intermediate Science candidates from all 38 districts of Bihar, including Patna, Gaya, Bhagalpur, and Darbhanga.
- Adaptive Test Difficulty: As your accuracy improves, the question engine will introduce more challenging conceptual questions to help build confidence for the subjective problems in Section B.
- Step-by-Step Reaction Explanations: Each question comes with a full explanation that shows the intermediate steps, the reagents used, and the balanced equations.
- Topper Comparison Sheet: Look at how the 95+ top scorers chose their 35 objective questions and managed the timing of their exam.
- Gamification & Daily Study Streaks: Earn badges and complete your daily 20-minute study goals to stay focused during your preparation.
AI-Based Weak Area Recommendation
The AI-powered identification of weak areas has the effect that if you take practice tests without going over the questions you got wrong, you'll end up making the same errors over and over again. Our platform includes an AI-driven diagnostic tool that functions similarly to a private tutor. The way the analysis operates is as follows: you take a 70-question practice test and indicate your answers to 35 of the questions. The system then assesses the questions that you answered correctly, those that you got wrong, and the ones you left out. For example, if you achieve a 100% score in Solutions and Kinetics but fail the questions regarding the Lucas Reagent or the Aldol Condensation, the system will show Organic Reaction Mechanisms in red on your dashboard. The system also gives an automatic recommendation: "You failed to answer three of the questions on identifying aldehydes and ketones using Tollens' and Fehling's tests. Please review the reagents in Chapter 8 and complete our 10-question Organic Distinction drill before taking your next full test."
Caption: The performance dashboard based on AI shows heatmaps by branch, analytics regarding the time taken per question, and personalized suggestions for revision for BSEB Class 12 Chemistry.
15 Common Mistakes Aspirants Make in Bihar Board Class 12th Chemistry
The 15 mistakes that students commonly make in BSEB Class 12th Chemistry – avoid these typical preparation errors if you want to keep your score high:
- Trying to answer more than 35 objective questions: filling in 40 or 50 bubbles on your OMR sheet is a waste of time since the scanner only considers the first 35 bubbles you have marked.
- Mixing up the reagents in named reactions: for example, confusing Clemmensen reduction (Zn-Hg/HCl) with Wolff-Kishner reduction (NH₂NH₂/KOH).
- Failing to remember the passing mark for the theory section: it’s important to note that there are separate passing requirements for the theory and practical exams, and you must achieve at least 21 marks in the theory part no matter what your practical score is.
- Omitting units in physical chemistry: this includes not converting temperatures from Celsius to Kelvin or using the wrong units for the universal gas constant (R) when calculating osmotic pressure.
- Ignoring the negative sign when calculating cell potential: writing E°_cell = E°_anode – E°_cathode instead of the correct formula, which is E°_cell = E°_cathode – E°_anode.
- Not recognising ambidentate ligands: for instance, ligands such as NO₂⁻ and SCN⁻ can bind through two different donor atoms, leading to linkage isomerism.
- Filling in the OMR bubbles too quickly: even if you solve the questions correctly on paper, you might accidentally mark the wrong row on the OMR sheet.
- Neglecting the effect of lanthanoid contraction: you should explain why the second and third row transition elements (such as Zr and Hf) have almost identical atomic radii.
- Studying without a stopwatch: by not timing yourself while doing practice sets, you end up with poor time-management skills during the actual exam.
- Skipping the qualitative distinction tests: tests like the iodoform test and the carbylamine test, which come up every year, are often overlooked.
- Disregarding the chapter on biomolecules: many students skip Chapter 10 because it seems to be descriptive, but this means they are missing out on 6 to 8 straightforward marks on topics such as glucose, amino acids, and vitamins.
- Confusing the primary and secondary battery reactions: mixing up the discharging reaction in a lead storage battery with that of a dry cell.
- Forgetting to include essential reaction conditions: writing down the organic products without mentioning necessary catalysts such as dry ether, sunlight, or specific temperatures.
- Over-calculating in Section A: spending three minutes on a complex numerical question when simpler questions that can be solved using direct formulas are available.
- Leaving objective answers blank: since there is no negative marking, not attempting any of your 35 objective questions is a missed chance.
Preparation Strategy: Steps for Theory, Objective Questions and Practical Labs
In order to score 90 or more in Chemistry, you have to prepare for all three parts at the same time:
Each day practise solving 35 objective questions within 30 minutes, concentrating on recognising direct formulae and writing chemical equations.
Practice writing two-mark answers that include balanced chemical equations. Also practice five-mark derivations such as the integrated rate laws and industrial preparations.
Keep a clean practical record notebook. Practice salt analysis (to identify one cation and one anion) and volumetric titration calculations (using KMnO₄ against Mohr’s salt).
Complete at least five full-length model papers. Spend 45 minutes on Section A (OMR), 75 minutes on the short answer section, 55 minutes on the long answer section, and leave 20 minutes for review.
Recommended Reference Books and Study Materials
The following are the study resources that have been proven to be effective:
| Resource Title | Publisher / Source | How to Use It |
|---|---|---|
| NCERT Chemistry Class 12 (Part 1 & Part 2) | NCERT / BSTBPC Bihar | Your main textbook. Go through every chapter, do all the in-text examples, and complete the exercise questions. |
| BSEB Official Model Question Papers | Bihar School Examination Board | Use the latest official model papers to get used to the type of questions and the format. |
| Golden / Alok / Target BSEB Question Bank | Reputed Bihar Publishers | Go through the chapter-wise solved objective and subjective questions from the past 10 years (2015 to 2026). |
| MockTestCenter.com Practice Series | MockTestCenter / Sarkarimocktest | Take timed chapter-wise drills and complete 70-question OMR simulations with immediate accuracy feedback. |
Eligibility Criteria: Who is eligible to take the BSEB Inter Science Chemistry exam?
Candidates must meet the standard eligibility requirements set by the Bihar School Examination Board:
| Eligibility Factor | Official Requirement | Key Details |
|---|---|---|
| Academic Stream | Intermediate of Science (I.Sc) | Must be enrolled in Class 12 with Chemistry as a compulsory subject. |
| School Affiliation | Recognised Higher Secondary School / College | Must be enrolled in an institution affiliated with the Bihar School Examination Board. |
| Pre-Board (Sent-Up) Exam | Mandatory Passing Requirement | Must take and pass the school’s Sent-Up theory and practical examinations in November. |
| Minimum Class Attendance | 75% Attendance Requirement | Regular students must meet the board’s minimum attendance policy during the academic year. |
| Registration Record | Valid BSEB Registration Number | Must have an official registration card and roll code issued by BSEB. |
Bihar Board Class 12th Chemistry 2027 Important Dates
Stay on top of the key dates in the 2027 examination cycle:
| Examination Milestone | Expected Timeline | Official Status |
|---|---|---|
| Examination Form Submission | September to October 2026 | Handled through the school headmaster |
| Dummy Admit Card Verification | November 2026 | Check the spelling of your name and your parent’s name |
| Sent-Up (Pre-Board) Exams | Late November to Early December 2026 | Mandatory internal screening tests |
| Practical Examination Admit Card | Late December 2026 | Required to enter the home school lab exams |
| Inter Chemistry Practical Exams | January 10 to January 20, 2027 | External evaluation at the home school |
| Final Theory Admit Card Release | Third week of January 2027 | Signed and stamped by the school principal |
| Class 12 Chemistry Theory Exam Date | Early February 2027 (First week) | State-wide theory exam at designated centres |
| Official Objective Answer Key Release | Late February / Early March 2027 | Available for objection filing on the BSEB portal |
| Inter Science Annual Result Declaration | Late March 2027 (Before March 31) | Online marksheet published on the official portals |
Free versus Paid Mock Test: What You Get
We think that basic practice should be available to all students in Bihar. Here’s how the free version compares to the full test package:
| Feature | Component | Free Access Tier | Pro Test Package |
|---|---|---|---|
| Full-Length 70-Question Tests | Simulation Sets | 2 Full Tests Free | 15 Complete BSEB Simulation Papers |
| Chapter-Wise Objective Tests | Subject Pool | All 10 Chapters Included | All 10 Chapters with Advanced Question Pools |
| Bilingual Language Toggle | Language Options | Included for All Questions | Included for All Questions |
| Reaction Mechanisms & Solutions | Step Breakdown | Detailed Text Solutions | Detailed Text Explanations & Mechanism Steps |
| Offline Printable PDFs | Download Access | Sample Model Paper PDF Included | All 15 Full Mocks Available as PDFs with Solutions |
| AI Weak Area Heatmap | Diagnostic Engine | Basic Overview | Comprehensive Micro-Topic Heatmap & Custom Drills |
| All India Rank & State Percentile | Benchmarking | Included on Free Tests | Detailed Cohort Analysis & District Rankings |
Daily Current Affairs & General Knowledge Quiz
When you are preparing for your board exams, keeping up with important state and national developments will help you build a solid background of general knowledge for the various competitive exams such as NEET, JEE, CUET, NDA, or SSC.
How to Apply: Bihar Board Class 12 Inter Science 2027 Exam Form Process
The application process is managed through your school or junior college:
- Get the examination form: Ask your school clerk or headmaster to get the official BSEB Intermediate Science examination form.
- Complete the section on personal details by filling in your name, your father's name, your mother's name, your date of birth, and your Aadhaar number exactly as they are listed on your BSEB Registration Slip.
- Choose your subject combination and make sure that Chemistry (subject code 118) is included together with Physics, Mathematics/Biology, Hindi, and English.
- You must attach two recent passport-sized colour photographs, a photocopy of your matriculation certificate, and a photocopy of your Class 11 registration slip.
- Pay the examination fee: The fee for the board examination differs slightly according to whether it is for the regular, private or reserved category.
- The headmaster of your school will verify the details and then submit your form online via seniorsecondary.biharboardonline.com.
- Check the Dummy Admit Card: When the board publishes the dummy admit card in November, make sure that your subject codes and personal details are correct. If you spot any errors, contact your school right away to have them corrected.
Your Next Step to Score 35/35 in Chemistry Objectives
Follow this practical daily study plan:
- Go through the micro-syllabus listed above and begin with the Organic Chemistry chapters that are most worthwhile.
- Take fifteen minutes to go over our checklist of Named Reactions and Distinction Tests.
- Get your first free practice test which consists of 70 questions on our platform.
- To develop a good sense of pace and to prevent being penalised for reaching the OMR cutoff, practise choosing and responding to exactly 35 questions.
- Look over your scorecard, check the branch accuracy heatmap, and read the step-by-step explanations for any questions that you got wrong
