In short: Bihar Board (BSEB) Class 10 has a unique 50% objective (MCQ) format. Each paper has 100 MCQs of which you must attempt exactly 50. Each correct answer gives 1 mark; there is no negative marking. This means 50 out of 100 marks come purely from MCQs filled on an OMR sheet. Mastering the MCQ section is the fastest route to securing a strong score. This guide covers MCQ strategies, elimination techniques, OMR sheet filling tips, and subject-wise practice questions.
Bihar Board Class 10 — The 50/50 Split
| Feature | Objective (MCQ) | Subjective |
|---|---|---|
| Marks | 50 | 50 |
| Questions Given | 100 | Varies (short + long answer) |
| Questions to Attempt | Exactly 50 | As specified per question |
| Answer Sheet | OMR (optical mark recognition) | Written answer booklet |
| Negative Marking | None | Not applicable |
| Time | Part of overall 3 hours 15 min | Same combined duration |
| Reading Time | 15 minutes before writing begins | Same |
The 50% MCQ format is unique to Bihar Board among major state boards. CBSE has no pure MCQ section this large. This gives Bihar Board students a strategic advantage: you can score 50 marks without writing a single paragraph.
The "100 Given, Attempt 50" Rule
This is the most important strategic element. You are given 100 MCQs but must bubble exactly 50 on the OMR sheet. What this means:
- You can skip the hardest 50 questions. No penalty for skipping.
- Choose the 50 you are most confident about. This is a filtering exercise.
- No negative marking means every guess has positive expected value — but only if you have narrowed options.
The Optimal Selection Strategy
Step 1 — First Pass (15 minutes): Read all 100 questions. Mark the ones you know immediately with a light pencil tick in the question booklet.
Step 2 — Count your "sure" answers. If you have 40+ sure answers, you only need 10 more from the remaining 60. If you have 30 sure answers, you need 20 more.
Step 3 — Second Pass (10 minutes): Among the remaining questions, identify where you can eliminate 2 options. These become your "probable" answers.
Step 4 — Fill OMR carefully. Transfer your best 50 answers to the OMR sheet. Check the question numbers match.
Step 5 — Use remaining time for subjective section.
OMR Sheet Filling — Critical Rules
The OMR sheet is machine-read. One mistake can cost you marks. Follow these rules:
| Rule | Why |
|---|---|
| Use only HB pencil or black/blue ballpoint pen (check instructions) | Scanner cannot read other inks |
| Fill the entire oval/circle completely | Partial fills may not register |
| Do not make stray marks anywhere on the sheet | Stray marks can be read as wrong answers |
| If you make a mistake, erase completely (pencil) or request new sheet (pen) | Half-erased marks confuse the scanner |
| Double-check question numbers | The most common OMR error is misaligned numbering |
| Fill exactly 50 — not 49, not 51 | Extra or fewer answers may lead to processing errors |
For more OMR sheet guidance specific to Bihar Board, see our Bihar Board OMR sheet guide.
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Subject-Wise MCQ Practice
Mathematics MCQ Practice (50 objective marks)
Real Numbers and Polynomials
- The HCF of 12, 18, and 24 is: (a) 6 (b) 12 (c) 3 (d) 24 → Answer: (a) 6
- If one zero of the polynomial x² - 5x + k is 2, the value of k is: (a) 4 (b) 6 (c) 8 (d) 10 → Answer: (b) 6
- The product of zeroes of 2x² + 5x - 3 is: (a) -3/2 (b) 5/2 (c) -5/2 (d) 3/2 → Answer: (a) -3/2
Quadratic Equations and AP 4. The discriminant of 2x² - 4x + 3 = 0 is: (a) -8 (b) 8 (c) -2 (d) 4 → Answer: (a) -8 5. The 10th term of the AP 3, 7, 11, 15... is: (a) 39 (b) 43 (c) 37 (d) 41 → Answer: (a) 39 6. If the 3rd term of an AP is 7 and the 7th term is 23, the common difference is: (a) 3 (b) 4 (c) 5 (d) 2 → Answer: (b) 4
Geometry 7. If a tangent is drawn from an external point 13 cm from the centre of a circle of radius 5 cm, the length of the tangent is: (a) 12 cm (b) 8 cm (c) 10 cm (d) 14 cm → Answer: (a) 12 cm 8. In triangles ABC and DEF, if AB/DE = BC/EF = AC/DF, then: (a) △ABC ~ △DEF (b) △ABC ≅ △DEF (c) They are not similar (d) Cannot determine → Answer: (a)
Trigonometry 9. The value of sin 30° + cos 60° is: (a) 1 (b) 0 (c) 1/2 (d) √3/2 → Answer: (a) 1 10. If tan θ = 1, then θ equals: (a) 30° (b) 45° (c) 60° (d) 90° → Answer: (b) 45°
Science MCQ Practice (50 objective marks)
Physics 11. The SI unit of electric current is: (a) Volt (b) Ohm (c) Ampere (d) Watt → Answer: (c) Ampere 12. When three resistors of 3Ω each are connected in parallel, the equivalent resistance is: (a) 9Ω (b) 3Ω (c) 1Ω (d) 6Ω → Answer: (c) 1Ω 13. The image formed by a concave mirror when the object is between F and C is: (a) real, inverted, diminished (b) real, inverted, magnified (c) virtual, erect, magnified (d) real, inverted, same size → Answer: (b) 14. Which colour of light has the shortest wavelength? (a) Red (b) Yellow (c) Violet (d) Green → Answer: (c) Violet
Chemistry 15. The pH of a neutral solution is: (a) 0 (b) 7 (c) 14 (d) 1 → Answer: (b) 7 16. Which gas is evolved when zinc reacts with dilute HCl? (a) O₂ (b) CO₂ (c) H₂ (d) N₂ → Answer: (c) H₂ 17. The chemical formula of baking soda is: (a) NaCl (b) NaOH (c) NaHCO₃ (d) Na₂CO₃ → Answer: (c) NaHCO₃ 18. An element with atomic number 17 belongs to which group? (a) Group 1 (b) Group 17 (c) Group 7 (d) Group 2 → Answer: (b) Group 17
Biology 19. The basic unit of life is: (a) tissue (b) organ (c) cell (d) organism → Answer: (c) cell 20. Photosynthesis occurs in: (a) mitochondria (b) chloroplast (c) ribosome (d) nucleus → Answer: (b) chloroplast 21. The correct sequence of organs in the human digestive system is: (a) mouth → stomach → oesophagus → intestine (b) mouth → oesophagus → stomach → intestine (c) oesophagus → mouth → stomach → intestine (d) mouth → intestine → stomach → oesophagus → Answer: (b)
Social Science MCQ Practice (50 objective marks)
- The Non-Cooperation Movement was started in: (a) 1919 (b) 1920 (c) 1930 (d) 1942 → Answer: (b) 1920
- Which soil is ideal for growing cotton? (a) Alluvial (b) Black (c) Red (d) Laterite → Answer: (b) Black
- The Panchayati Raj system was recommended by which committee? (a) Balwant Rai Mehta (b) Ashok Mehta (c) L.M. Singhvi (d) G.V.K. Rao → Answer: (a) Balwant Rai Mehta
- NREGA guarantees how many days of employment? (a) 50 (b) 100 (c) 150 (d) 200 → Answer: (b) 100
MCQ Elimination Techniques
When you do not know the answer outright, use these techniques:
1. Extreme Value Elimination
If one option is much larger or smaller than others, it is usually wrong. Example: "The resistance of a copper wire is approximately..." Options: (a) 0.001Ω (b) 2Ω (c) 500Ω (d) 10,000Ω — Eliminate (d) immediately.
2. "All of the Above" Trigger
If you know two of the options are correct, "All of the above" is likely the answer when present.
3. Grammar Matching
The correct answer grammatically fits the question stem. If the stem says "an," the answer starts with a vowel.
4. Opposite Options Elimination
If two options are exact opposites (e.g., "increases" and "decreases"), one of them is usually correct. Eliminate the other two.
5. Keyword Matching
Match keywords in the question with keywords in the options. Board questions rarely use trick language.
For more study strategies, see Bihar Board Class 10 important questions and the Bihar Board Maths weightage guide.
Time Management — MCQ vs Subjective Split
Total exam time is 3 hours 15 minutes (195 minutes including 15-minute reading time).
| Phase | Time | Activity |
|---|---|---|
| Reading Time | 15 min | Read all 100 MCQs. Mark confident ones. |
| MCQ First Pass | 30 min | Answer the 30-35 questions you know immediately |
| MCQ Second Pass | 15 min | Work on 15-20 uncertain questions using elimination |
| OMR Filling | 10 min | Transfer all 50 answers carefully to OMR |
| Subjective Section | 110 min | Write long and short answers |
| Review | 15 min | Check OMR alignment and subjective answers |
Many students make the mistake of spending too long on MCQs. 55 minutes for MCQs (including OMR) is optimal. The remaining time goes to subjective where each mark requires more writing effort.
Priority Topics for MCQ Preparation
| Subject | High-MCQ-Frequency Topics | Expected MCQs |
|---|---|---|
| Maths | Real Numbers, Trigonometry values, Statistics formulas | 15-20 |
| Science | Chemical formulas, Electricity units, Biology terms | 20-25 |
| Social Science | Dates, Acts, Constitutional provisions, Map-based | 15-20 |
| Hindi | Grammar, Poet/Author identification | 10-15 |
| English | Grammar, Vocabulary, Comprehension-based | 10-15 |
Last 30 Days MCQ-Focused Strategy
| Week | Action |
|---|---|
| Week 1 | Solve 100 MCQs per day from all subjects. Use BSEB previous papers. |
| Week 2 | Practice OMR sheet filling daily. Time yourself: 50 MCQs in 45 minutes. |
| Week 3 | Focus on weak subject MCQs. Memorise formulas and dates. |
| Week 4 | Full mock tests with OMR. Review timing strategy. |
Frequently Asked Questions
Is there negative marking in Bihar Board MCQs?
No. There is zero negative marking. This means every question you attempt has only upside. If you can eliminate even one option, it is worth answering.
What happens if I attempt more or fewer than 50 MCQs?
Attempting more than 50 may cause processing issues. The instruction clearly states to mark exactly 50. If you mark fewer, you lose easy marks. Always mark exactly 50.
Can I change my answer on the OMR sheet?
If using pencil, you can erase and re-mark. If using pen, ask for a replacement OMR sheet. Do not overwrite — it confuses the scanner.
Which subjects are easiest for MCQ scoring?
Social Science and Hindi/English language papers have the most direct MCQs (dates, definitions, grammar rules). Science MCQs require conceptual understanding. Maths MCQs need quick calculation ability.
How do I practise OMR sheet filling?
Download blank OMR sheet templates and practise filling 50 bubbles under timed conditions. The physical act of filling bubbles needs muscle memory.
Is the Bihar Board MCQ pattern likely to change in 2027?
BSEB has maintained the 50% objective format consistently. There is no announcement of any change for 2027. Prepare for the same pattern.
Related Guides
- Bihar Board Class 10 Important Questions 2027
- Bihar Board Class 10 Maths Weightage
- Bihar Board Last 30 Days Subject Wise Plan
- Bihar Board OMR Sheet Guide
- Board Exam Time Management Strategy
- Fear of Failing Board Exams
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