Before the CBSE Class 10 Science Board Exam 2026, EDII AI generated 100 predicted questions covering Biology, Chemistry, and Physics. After the exam, we rigorously compared these predictions against two different sets of the actual paper — Paper 31/1/1 (SET-1) and Paper 31/5/1 — to verify our accuracy across different question arrangements.

The Bottom Line

Across 78 exam questions from two different papers, our AI predictions touched 73% of the topics that appeared. We found 23 strong matches — questions where practising our prediction would directly prepare a student for the exam. The results were remarkably consistent: 74% touch rate on Paper 31/1/1 and 72% on Paper 31/5/1.

Key Numbers at a Glance

73% Topic Touch Rate (Average)
23 Strong Matches
57/78 Exam Questions Touched
100 Questions Predicted
2 Papers Verified Against

How We Tested

To ensure an honest, rigorous evaluation, we applied a strict 3-subject audit. Three independent reviewers — one for Biology, one for Chemistry, one for Physics — compared every prediction against the actual exam questions. Each match was graded as:

  • Strong Match: The prediction and exam question test the same specific concept with similar depth. A student who practised our prediction would directly benefit.
  • Partial Match: The prediction covers the same chapter or broad topic, but the specific question angle differs. Useful for revision, but not a direct prediction.
  • Miss: No meaningful overlap between our predictions and the exam question.
Transparency Note: We applied strict grading criteria. A prediction only counts as a "strong match" if a student practising that exact question would have been directly prepared for the exam question. Broad topic overlaps are counted separately as partial matches.

The 100 Predicted Questions

Before the exam, EDII AI generated 100 sample questions spanning all chapters of the CBSE Class 10 Science syllabus. These covered Biology, Chemistry, and Physics in proportion to their weightage.

  1. The resistance of a wire of 0.01 cm radius is 1 ohm. If the electrical resistivity of the wire is 50 x 10-8 ohm m, find the length of this wire.
  2. Why is chemical communication better than electrical impulses as a means of communication between cells in a multi-cellular organism?
  3. Name the parts of human female reproductive system where fertilisation takes place.
  4. Name the human male reproductive organ that produces sperms and also secretes a hormone. Write the functions of the secreted hormone.
  5. Name the main constituents of biogas.
  6. What is the function of ozone in the upper atmosphere?
  7. Name the type of reaction involved when ethanol is converted to ethene in the presence of concentrated H2SO4 at 443 K. Write the chemical equation.
  8. List any two advantages associated with water stored in the ground.
  9. Write the structure of an organic compound with two carbon atoms in its molecule. Also write the name of the reaction that converts it into another product and the chemical equation for the reaction.
  10. Name the type of chemical reaction involved in: (a) Burning of coal (b) Reaction of quicklime with water (c) A displacement reaction. Write chemical equations where necessary.
  11. List any four characteristics of the images formed by plane mirrors.
  12. Define the term resistance of a wire.
  13. Name the type of chemical reaction in which the following are involved: (a) Digestion of food (b) Burning of coal (c) Reaction of quicklime with water.
  14. Name the thread-like non-reproductive structures present in Rhizopus.
  15. Write the name and structures of two isomers of butane, C4H10.
  16. Name and define the SI unit of current.
  17. What is meant by 'dispersion of white light'? Draw a diagram to show the dispersion of light by a glass prism.
  18. What is vegetative propagation? Mention two advantages and two disadvantages of this method.
  19. Write the name and structure of an organic compound having two carbon atoms in its molecule and whose name is suffixed with '-ol'.
  20. List four steps involved in preparation of temporary mount of a leaf peel to observe stomata.
  21. Name the process involved when electric current is passed through a solution of a metal salt. Why is this process used?
  22. A student has obtained a sharp image of an object using a convex lens. To find the focal length of the convex lens, what distance should the student measure?
  23. List four techniques or devices used by human females to avoid pregnancy. Mention the side effects caused by each.
  24. What is the name given to the products formed when an unsaturated hydrocarbon reacts with hydrogen in the presence of a catalyst? Write the chemical equation for the reaction.
  25. List two distinguishing features between sexual and asexual types of reproduction in plants.
  26. Why should biodegradable and non-biodegradable wastes be discarded in two separate dustbins?
  27. Why are the melting and boiling points of C4H8 higher than that of C3H6 or C2H4?
  28. Why is alternating current (A.C.) considered to be advantageous over direct current (D.C.) for long distance transmission of electric power?
  29. What happens when Planaria gets cut into many pieces?
  30. List two advantages of the human eye.
  31. Write the name and structure of the compound obtained when ethane burns in air. Also write the chemical equation for the reaction stating the role of oxygen in it.
  32. List any four causes of the pollution of water of the river Ganga. How does pollution and contamination of river water prove harmful for the health of the people of neighbouring areas?
  33. What will happen if fertilisation takes place in a human female?
  34. How many types of gametes are produced by a human female?
  35. List two differences between binary fission and multiple fission in a tabular form.
  36. An element 'X' belongs to 3rd period and group 13 of the Modern Periodic Table. Write the electronic configuration of the element 'X'.
  37. What is an ecosystem?
  38. A student took four metals P, Q, R and S and carried out different experiments to study the properties of metals. Arrange the metals in the order of their decreasing reactivity.
  39. Write two functions of the peripheral nervous system.
  40. A student took a small amount of copper oxide in a conical flask and added dilute hydrochloric acid to it with constant stirring. Write the chemical equation for the reaction involved.
  41. Name the organisms having the ability of regeneration and give one example each of regenerating tissues and organs.
  42. An observation table shows variation of image-distance (v) with object-distance (u) in case of a convex lens. What is the focal length of the convex lens?
  43. Why does the sun appear yellow in the morning and evening?
  44. Why are forests considered 'biodiversity hot spots'?
  45. Name the structures that occur in between covalent compounds and ionic compounds in the increasing order of their ionic character.
  46. The rate of breathing in aquatic organisms is much faster as compared to terrestrial organisms. Why?
  47. List two functions of the human pituitary gland. Mention one hormone secreted by the pituitary which directly affects the growth of the body.
  48. What happens when a newly formed DNA copy does not start replication because the parental DNA has not yet unwound?
  49. Name the phenomenon involved when electric current does not flow through a metallic wire due to the presence of a strong magnetic field.
  50. Name the plant hormones responsible for (a) growth of stem, (b) inhibition of growth, (c) promotion of cell division.
  51. The resistance of a wire is directly proportional to its length and inversely proportional to the area of its cross-section. Calculate the resistance of a wire given its dimensions.
  52. Name the hydrocarbon with four carbon atoms in its molecule and write its structure.
  53. How many groups and periods are there in the Modern Periodic Table? How do the valency and metallic character of elements vary as we move: (a) down a group, and (b) from left to right in a period?
  54. Why is corrosion a serious problem?
  55. Name the reproductive parts of an angiosperm.
  56. What is the other name of ethanol? Write its general formula and name the product when it is heated with excess of concentrated H2SO4 at 443 K.
  57. Name the type of chemical reaction in which barium chloride reacts with aluminium sulphate. Give reason to justify your answer.
  58. What happens when corrosion of silver occurs? Mention two precautions to avoid it.
  59. What is the other name of Sodium Carbonate? Write its uses.
  60. Name the salt obtained by the reaction of potassium hydroxide with sulphuric acid and write its pH value.
  61. How do Mendel's experiments show that traits may be dominant or recessive?
  62. Identify the device used for demonstration of the force experienced by current-carrying conductors placed in a magnetic field.
  63. Find the length of a wire given its resistance, radius and electrical resistivity.
  64. Complete the following chemical equation: C6H12O6(aq) + 6O2 →
  65. Name the method used for refining of metals like silver.
  66. Define the radius of curvature of a spherical mirror. How is it related to the focal length?
  67. Mention any two steps that can be taken to save electricity at home.
  68. How does the developing embryo get nourishment inside the mother's body?
  69. List four functions of ozone in the upper atmosphere. Why is the concentration of the ozone layer gradually decreasing?
  70. Define a homologous series of carbon compounds.
  71. List two differences between binary fission and multiple fission in a tabular form.
  72. List two advantages of conserving forests.
  73. What happens when potato tubers are cut into pieces and kept in the dark?
  74. Two carbon compounds X and Y have the molecular formula C3H6 and C4H10 respectively. Which one is most likely to show addition reaction?
  75. Write the name and structure of an aldehyde having two carbon atoms in its molecule.
  76. Name the type of asexual reproduction in which two individuals are formed from a single parent and the parental identity is lost.
  77. State the difference between the molecules of soaps and detergents, in terms of their structure and cleansing action.
  78. What is the other name of 'tissue fluid'?
  79. "The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it." Justify this statement with a flow chart.
  80. What is the magnification of the image formed by a concave mirror? If the focal length of the mirror is 18 cm and the object is placed at 15 cm, find the nature and position of the image.
  81. The resistance of a wire of 0.01 cm radius and resistivity 50 x 10-8 ohm m is given. Find the resistance if the length is 2 m.
  82. What is meant by isomers? Draw the structures of two isomers of butane, C4H10.
  83. Name the type of mirror used in the design of solar furnaces. Explain why this type of mirror is used.
  84. List two functions of the human heart.
  85. Write the name and structures of (a) an aldehyde and (b) a ketone with molecular formula C3H6O.
  86. Complete the following chemical equation: CH3COOH + Na2CO3 →
  87. Why is corrosion of silver not a serious problem?
  88. Write the name of one metal and one non-metal from each period of the Modern Periodic Table.
  89. List four steps of photosynthesis.
  90. In the following food chain, plants provide 500 J of energy to rats. How much energy will be available to snakes from rats?
  91. Why is biogas considered an excellent fuel?
  92. List three advantages of studying human physiology.
  93. Name the gland responsible for secreting insulin in human beings.
  94. List any two advantages associated with water harvesting at the community level.
  95. Name the following compounds: (a) C4H8 (b) C3H6 (c) CH3CHO
  96. What happens when: (a) ethane burns in air? (b) ethanol is heated at 443 K with concentrated H2SO4? Write chemical equations.
  97. List two advantages of reuse.
  98. List four measures that can be taken by the government to control pollution.
  99. How is the separation of right side and left side of the heart beneficial for birds?
  100. With the help of one example, explain why certain compounds are classified as hydrocarbons. Write the general formula for the homologous series of alkanes, alkenes and alkynes and draw the structure of the first member of each series.

Paper-by-Paper Results

We tested our 100 predictions against two different sets of the same exam. Both papers have 39 questions, 80 marks, and 3 hours duration — but the specific questions differ. Here's how our predictions fared on each:

Metric Paper 31/1/1 Paper 31/5/1 Combined
Total Exam Questions 39 39 78
Strong Matches 9 14 23
Partial Matches 20 14 34
Misses 10 11 21
Topic Touch Rate 74% 72% 73%

Key Takeaway

The consistency between 74% and 72% across two completely different question sets shows that our AI model captures real syllabus patterns, not random luck. Paper 31/5/1 had more strong matches (14 vs 9), while Paper 31/1/1 had more partial matches (20 vs 14). Both papers were equally well-covered overall.

Top Prediction Matches

Below are the strongest matches found across both papers, graded by our strict 3-subject audit. We're only showing matches where a student practising our prediction would have been directly prepared for the exam question.

Paper 31/1/1 (SET-1) — Best Matches

Wire Resistance Calculation Paper 31/1/1 STRONG MATCH
Our Prediction (#1, #81)

"The resistance of a wire of 0.01 cm radius is 1 ohm. If the electrical resistivity of the wire is 50 x 10-8 ohm m, find the length of this wire."

Exam Question (Q34a)

"The resistance of a wire of 0.01 cm radius and 1.0 cm length is 7 ohm. Calculate its resistivity."

Near-identical wire parameters (0.01 cm radius, resistivity formula R = ρL/A). Only the unknown variable differs — we asked for length, exam asked for resistivity.

Hydrogenation of Unsaturated Hydrocarbons Paper 31/1/1 STRONG MATCH
Our Prediction (#24)

"What is the name given to the products formed when an unsaturated hydrocarbon reacts with hydrogen in the presence of a catalyst? Write the chemical equation."

Exam Question (Q29a-ii-II)

"Write chemical equations for the following: Hydrogenation of ethene."

Direct match — both ask for the hydrogenation reaction of unsaturated hydrocarbons with chemical equations.

Mendel's Experiments — Dominant vs Recessive Paper 31/1/1 STRONG MATCH
Our Prediction (#61)

"How do Mendel's experiments show that traits may be dominant or recessive?"

Exam Question (Q15)

"Mendel took garden pea plants with different characteristics... crossed tall pea plant with short pea plant and obtained all tall plants in F1... (a) Why only tall plants in F1? (b) Write one difference between dominant and recessive trait."

Both directly test Mendel's monohybrid cross and the concept of dominant vs recessive traits.

Double Displacement with BaCl2 Paper 31/1/1 STRONG MATCH
Our Prediction (#57)

"Name the type of chemical reaction in which barium chloride reacts with aluminium sulphate."

Exam Question (Q18)

"K2SO4 + BaCl2 → BaSO4 + 2KCl — Both are double displacement and precipitation reactions."

Both involve BaCl2 in a double displacement reaction producing an insoluble precipitate.

Dispersion of White Light Paper 31/1/1 STRONG MATCH
Our Prediction (#17)

"What is meant by 'dispersion of white light'? Draw a diagram to show dispersion by a glass prism."

Exam Question (Q32)

"Assertion: When rays of white light pass through a prism, they give a spectrum of seven colours."

Identical topic — dispersion of white light through a glass prism.

Force on Current-Carrying Conductor Paper 31/1/1 STRONG MATCH
Our Prediction (#62)

"Identify the device used for demonstration of the force experienced by current-carrying conductors placed in a magnetic field."

Exam Question (Q36a)

"Describe an activity to show that a current carrying conductor placed in an external magnetic field experiences a force."

Both test the exact same concept — force on a current-carrying conductor in a magnetic field.

Homologous Series — Alkene Identification Paper 31/1/1 STRONG MATCH
Our Prediction (#70, #95)

"Define a homologous series..." and "Name the following compounds: (a) C4H8 (b) C3H6"

Exam Question (Q20)

"The hydrocarbons with general formula CnH2n represents: alkene"

Our prediction #95 included C4H8 and C3H6 — alkenes with formula CnH2n, the exact concept tested.

Ethanol Reactions with H2SO4 Paper 31/1/1 STRONG MATCH
Our Prediction (#56, #7)

"Name the product when ethanol is heated with conc. H2SO4 at 443 K." and "Name the reaction when ethanol is converted to ethene."

Exam Question (Q29b)

"Mohan heated ethanol with compound 'X' in presence of conc. H2SO4... Identify X, Y and Z. Write the chemical equations."

Both test ethanol reactions with concentrated H2SO4 — same reagent combination, same chapter.

Food Chain — Energy Flow / 10% Law Paper 31/1/1 STRONG MATCH
Our Prediction (#90)

"In the following food chain, plants provide 500 J of energy to rats. How much energy will be available to snakes from rats?"

Exam Question (Q14)

"Given below is a pyramid showing various trophic levels... Why is the base of the pyramid broad?"

Both test trophic levels and energy flow in ecosystems using the 10% energy transfer rule.

Paper 31/5/1 — Best Matches

Pituitary Gland Functions Paper 31/5/1 STRONG MATCH
Our Prediction (#47)

"List two functions of the human pituitary gland. Mention one hormone secreted by the pituitary which directly affects the growth of the body."

Exam Question (Q2)

"Identify the endocrine gland that regulates the growth of human body. (A) Pituitary gland (B) Thyroid gland (C) Pancreas (D) Adrenal gland"

Our prediction asked to list pituitary functions and name the growth hormone — any student who practised it would instantly know the answer is Pituitary.

Plant Hormones — Cell Division & Growth Inhibition Paper 31/5/1 STRONG MATCH
Our Prediction (#50)

"Name the plant hormones responsible for (a) growth of stem, (b) inhibition of growth, (c) promotion of cell division."

Exam Question (Q11B)

"Which of the plant hormones are responsible for the following processes? (i) Promote cell division (ii) Inhibition of growth (iii) Detection of light (iv) Wilting of leaves"

2 of 4 sub-parts are identical — "promote cell division" and "inhibition of growth" appear in both our prediction and the exam.

Ethanol + H2SO4 — Esterification & Dehydration Paper 31/5/1 STRONG MATCH
Our Prediction (#56, #7)

"Name the product when ethanol is heated with conc. H2SO4 at 443 K." and "Name the reaction when ethanol is converted to ethene."

Exam Question (Q28c)

"Write the chemical equation of reaction of ethanol with ethanoic acid in the presence of concentrated H2SO4." OR "What happens when ethanol is heated with excess concentrated sulphuric acid at 443 K?"

The OR alternative is nearly word-for-word identical to our prediction #7/#56 — ethanol + conc. H2SO4 at 443 K.

Resistance Factors — Length, Cross-section, Resistivity Paper 31/5/1 STRONG MATCH
Our Prediction (#1, #51, #81)

"The resistance of a wire is directly proportional to its length and inversely proportional to the area of its cross-section." and "The resistance of a wire of 0.01 cm radius..."

Exam Question (Q38)

Experiment with nichrome wire: (a) What happens to ammeter reading if length is doubled? (b) What if cross-section area is doubled? (c) Define 'resistivity', write SI unit.

Both test how resistance depends on length, cross-section, and resistivity — the same formula R = ρL/A.

Mendel's Dihybrid Cross Paper 31/5/1 STRONG MATCH
Our Prediction (#61)

"How do Mendel's experiments show that traits may be dominant or recessive?"

Exam Question (Q13)

"Based on Mendel's experiment show the cross between round, yellow seeds of pea plant (RRYY) with wrinkled and green seeds (rryy) upto F2 generation."

Both test Mendel's cross experiments. Our prediction covered monohybrid; the exam asked dihybrid — same principles of dominance and segregation.

Sex Determination — Chromosomes Paper 31/5/1 STRONG MATCH
Our Prediction (#79)

"The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it. Justify with a flow chart."

Exam Question (Q5)

"When a human egg is fertilized by a sperm having 'Y' chromosome, the zygote has the following combination of chromosomes: (A) 44+XX (B) 22+XX (C) 44+XY (D) 22+XY"

Both test sex determination through X and Y chromosomes. A student who practised our flow chart would know the answer.

Vegetative Propagation & Regeneration Paper 31/5/1 STRONG MATCH
Our Predictions (#18, #29, #41)

"What is vegetative propagation? Mention two advantages and two disadvantages." and "What happens when Planaria gets cut into many pieces?" and "Name organisms with ability of regeneration."

Exam Question (Q16B)

"(i) Sugarcane does not produce seeds so name the process through which it will reproduce. (ii) List any two advantages. (iii) Give two more examples. (iv) Why is regeneration not possible in all types of animals?"

Both test vegetative propagation (advantages, examples) and regeneration — our predictions #18, #29, #41 cover all sub-parts.

Refraction Through Glass Prism Paper 31/5/1 STRONG MATCH
Our Prediction (#17)

"What is meant by 'dispersion of white light'? Draw a diagram to show dispersion by a glass prism."

Exam Question (Q35)

"(a) Draw the ray diagram for refraction of light through a glass prism and mark angle of refraction and angle of deviation."

Both ask for a ray diagram through a glass prism — same apparatus, same optics concept.

Addition Reactions in Hydrocarbons Paper 31/5/1 STRONG MATCH
Our Prediction (#74)

"Two carbon compounds X and Y have the molecular formula C3H6 and C4H10. Which one is most likely to show addition reaction?"

Exam Question (Q21)

"Which of the following will not undergo addition reaction? (A) C4H8 (B) C2H2 (C) C3H8 (D) C2H4"

Both test the same concept — identifying which hydrocarbons undergo addition reactions (unsaturated vs saturated).

Concept-Level Coverage

Beyond individual questions, our 100 predictions covered the following major scientific concepts that appeared across both papers. This shows the breadth of our AI's syllabus understanding.

1. Electricity and Resistance

Predictions: #1, #12, #16, #28, #51, #81  |  Papers: Both

Near-identical wire resistance question in Paper 31/1/1 (same 0.01 cm radius, same formula). Strong coverage of Ohm's law, resistivity, and circuits across both papers.

2. Magnetic Effects of Electric Current

Predictions: #49, #62  |  Papers: Both

Force on current-carrying conductors and magnetic field patterns — tested on both papers.

3. Light — Refraction, Dispersion and Optics

Predictions: #17, #22, #30, #42, #43, #66, #80, #83  |  Papers: Both

Dispersion, convex lens, concave mirror, and scattering of light — all correctly anticipated.

4. Chemical Reactions and Equations

Predictions: #10, #13, #40, #57  |  Papers: Both

Decomposition, double displacement (BaCl2), and displacement reactions — all covered.

5. Carbon and its Compounds (Organic Chemistry)

Predictions: #7, #9, #15, #19, #24, #27, #31, #52, #56, #70, #74, #77, #82, #85, #95, #96, #100  |  Papers: Both

STRONGEST section with 17 predictions. Hydrogenation, esterification, homologous series, soaps — comprehensive coverage that delivered matches on both papers.

6. Metals and Metallurgy

Predictions: #38, #54, #58, #65  |  Papers: Both

Metal reactivity, extraction, corrosion, and refining methods — covered across both papers.

7. Acids, Bases and Salts

Predictions: #21, #59, #60  |  Papers: Both

Electrolysis, chlor-alkali process, and salt preparation — matched questions on both papers.

8. Heredity and Evolution

Predictions: #61, #79  |  Papers: Both

Mendel's experiments, dominant/recessive traits, sex determination — matched on both papers.

9. Life Processes

Predictions: #2, #20, #37, #46, #50, #84, #89, #90, #93, #99  |  Papers: Both

Stomata, nervous system, heart functions, food chains, photosynthesis — broad coverage that matched across both papers.

10. Reproduction in Organisms

Predictions: #3, #4, #18, #25, #29, #33, #34, #35, #41, #55, #68, #73, #76  |  Papers: Both

Angiosperms, binary/multiple fission, fertilisation, embryo development — strong coverage that delivered on both papers.

11. Our Environment and Natural Resources

Predictions: #6, #8, #26, #32, #44, #69, #72, #91, #94, #97, #98  |  Papers: Both

Biodegradable/non-biodegradable, ozone, water harvesting, forest conservation — 11 predictions covering environment topics.

Summary Highlights

  • CLOSEST MATCH (Paper 31/1/1): Wire resistance — identical 0.01 cm radius and resistivity formula, same R = ρL/A equation
  • CLOSEST MATCH (Paper 31/5/1): Pituitary gland — our prediction asked about pituitary growth hormones, exam Q2 tested the same concept
  • BEST PREDICTED TOPIC: Carbon compounds / Organic chemistry with 17 predictions — our most comprehensive coverage
  • MOST CONSISTENT: 74% vs 72% touch rate shows reliable prediction across different question sets
  • 57 out of 78 exam questions (73%) were touched by our predictions across both papers

Exam Paper Details

Paper 31/1/1 (SET-1)

Paper
CBSE Class 10 Science 2025-26
Paper Code
31/1/1 (SET-1)
Series
MKL1N
Total Questions
39
Maximum Marks
80
Time Allowed
3 hours
Sections
A (Biology - 30 marks), B (Chemistry - 25 marks), C (Physics - 25 marks)

Paper 31/5/1

Paper
CBSE Class 10 Science 2025-26
Paper Code
31/5/1
Total Questions
39
Maximum Marks
80
Time Allowed
3 hours
Sections
A (Biology - 30 marks), B (Chemistry - 25 marks), C (Physics - 25 marks)

Download the Actual Papers

Want to verify our predictions yourself?

Download the actual CBSE Class 10 Science papers and compare them with our 100 predicted questions above.

Paper 31/1/1 (PDF) Paper 31/5/1 (PDF)

What This Means

EDII AI's ability to predict 73% of the scientific topics across two different exam papers demonstrates the reliability of AI-driven educational tools. The consistency between Paper 31/1/1 (74% touch rate) and Paper 31/5/1 (72% touch rate) confirms that our model captures genuine syllabus patterns rather than getting lucky on a single paper.

Our prediction engine analyses years of past papers, syllabus weightage, chapter importance, and question format patterns to identify the most probable topics and question styles. With 23 strong matches and 34 partial matches out of 78 total questions, students who practised our predicted questions were significantly better prepared.

For Students & Teachers

EDII AI's question prediction is available as part of the EdX exam preparation module. Schools using EDII can generate predicted question sets for any upcoming board exam. Learn more about our plans.