Bihar Board Class 10 Science Important Questions 2026

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Bihar Board Class 10 Science Important Questions 2026 is the best way to revise the syllabus. Solving these questions will help you understand the structure of the question paper for the main board exams. You can improve the accuracy of answers along with the speed of answering the questions. According to the Bihar Board Class 10 Science Exam Pattern 2026 , the question paper will consist of 80 MCQs, out of which you are required to answer 40. The next section will consist of short-answer type questions, followed by long-answer type questions separately for each subject. The duration of the paper will be 2 hours and 45 minutes. The question paper will also have separate questions for Physics, Chemistry, and Biology. Do not forget to download the latest Bihar Board Class 10 Science Syllabus 2025-26 to understand the questions. Want to check the Bihar Board Class 10 Science Important Questions 2026, you can go through the article below.

Bihar Board Class 10 Science Important Questions 2026 of 1 Mark

The very first section of the question paper will consist of objective-type questions in the form of MCQs. A total of 80 MCQs will be included in this section, out of which you are only required to answer 40. You can refer to some of the Bihar Board Class 10 Science Important Questions 2026 of 1 Mark below, according to the latest model test papers released by the Bihar School Examination Board here.

Question 1: Where are large numbers of light-sensitive cells present?

(A) In Cornea (B) In Pupil (C) In Retina (D) None of these

Question 2: A rectangular coil of copper wire is rotated in a magnetic field. The direction of the induced current in the coil changes after

(A) every one-fourth rotation

(B) every half rotation

(C) every one rotation

(D) every two rotations

Question 3: A Mushroom is

(A) a saprophyte

(B) a parasite

(C) an autotroph

(D) an algae

Question 4: The end product of anaerobic respiration in plants is

A. amino acid B. fatty acid C. ethyl alcohol D. None of these

Question 5: The normal systolic blood pressure is -

A. 80 mm

C. 120 mm

B. 100 cm

D. 130mm

Question 6: An ore of Zinc is-

(A) Bauxite (B) Sodium chloride (C) Cinnabar (D) Zinc blende

Question 7: How many laws are there for the reflection of light?

(A) 1 (B) 2 (C) 3 (D) 4

Question 8: The focal length of which mirror is taken as negative according to the convention of signs?

(A) Plane mirror

(B) Concave mirror

(C) Convex mirror

(D) None of these

Question 9: Who wrote the book “The Origin of Species”?

A. Lamarck B.Darwin C. Mendel D. None of these

Question 10: The structural and functional unit of the kidney is called-

(A) Ureter (B) Glomerulus (C) Nephron (D) Bowman’s capsule

Bihar Board Class 10 Science Important Questions 2026 of 2 Marks

In the second section, there are 24 short-answer type questions for 2 marks each. Out of these, eight questions are from Physics, eight questions are from Chemistry, and eight are

from Biology. You are required to answer four questions from each subject. Check out the Bihar Board Class 10 Science Important Questions 2026 of 2 Marks here:

Bihar Board Class 10 Science Important Questions 2026 for Physics

Question 1: Write the ‘right-hand thumb’ rule related to the magnetic effect of electric current.

Question 2: Draw a labelled diagram of an electric bulb.

Question 3: What is the source of energy of the sun?

Question 4: What is the electric potential difference? Write its SI unit?

Question 5: What do you mean by scattering of light? Explain it by giving an example.

Bihar Board Class 10 Science Important Questions 2026 for Chemistry

Question 1: Describe a precipitation reaction with an example.

Question 2: Write the balanced chemical equations for the following reactions:

(a) Zinc + Silver nitrate → Zinc nitrate + Silver

(b) Sodium + Water → Sodium hydroxide + Hydrogen.

Question 3: Why should curd and sour substances not be kept in brass and copper vessels?

Question 4: Why do ionic compounds have high melting points?

Question 5: Write down the electronic configuration of P(15) and Ar (18).

Bihar Board Class 10 Science Important Questions 2026 for Biology

Question 1: What is the double circulation of blood in humans?

Question 2: What would happen if we eliminated all organisms at a trophic level?

Question 3: What is photosynthesis? Write the equation of its chemical reaction.

Question 4: What is fermentation? What are its uses?

Question 5: Name the respiratory organ of the following organisms –

(a) fish

(b) earthworm

Also Read: Bihar Board Class 10 Science Model Paper 2025-26

Bihar Board Class 10 Science Important Questions 2026 of 5 Marks

A total of 6 long-answer type questions will be included in the question paper. There will be two questions each from Physics, Chemistry, and Biology. The long-answer type questions from Chemistry and Biology will carry 5 marks. You can refer to the important questions here:

Bihar Board Class 10 Science Important Questions 2026 for Chemistry

Question 1: Mention some unique properties of carbon and explain why the number of compounds of carbon is innumerable.

Question 2: Write down the laboratory method of preparation of methane and its chemical reaction with chlorine.

Question 3: Differentiate between metals and non-metals based on their chemical properties.

Question 4:What is the effect of deforestation on wildlife?

Bihar Board Class 10 Science Important Questions 2026 for Biology

Question 1: Draw a well-labelled diagram of a nephron.

Question 2: What is a food chain? Explain it with an example.

Question 3: How does energy flow in an ecosystem?

Question 4: Draw a labelled diagram of the longitudinal section of a flower and mention the different parts of the flower.

Bihar Board Class 10 Science Important Questions 2026 of 6 Marks

Out of the six long-answer type questions included in the question paper, the long-answer type questions from Physics will carry around 6 marks each. You are required to answer at least one long-answer-type question from Physics. You can refer to the important questions from the pointers given below:

Question 1: Explain the first and second principal focus of convex and concave lenses with the help of a ray diagram.

Question 2: Explain conductor, insulator, and semiconductor with examples.

Question 3: What is long-sightedness (hypermetropia)? What are its causes? Explain the method of correcting this defect with a diagram.

Question 4: Explain the principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?

Also Read: Bihar Board Class 10 Science Previous Year Question Paper

Which chapters have more weightage in the Bihar Board Class 10 Science?

A total of 5 major sections are included in the syllabus for Science. Out of all the units, Objects in Motion is the most important unit since it holds the most weight. You can refer to the detailed syllabus from the table given below to understand the weightage for each unit:

You are required to actively solve the Bihar Board Class 10 Science Important Questions 2026 after completing the syllabus to understand the commonly asked questions and important topics. Make sure to follow a well-curated study plan to complete your syllabus on time and revise within the last few weeks.

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