Tamil Nadu SSLC Class 10 All Subjects Important Questions 2027 - Samacheer Kalvi

In short: Tamil Nadu SSLC exams begin March 17, 2027, with practicals in February. Each subject carries 100 marks. The Samacheer Kalvi textbook is the sole source for questions — book-back exercises are the most important resource. This guide covers the highest-scoring questions across all five core subjects: Tamil, English, Maths, Science, and Social Science.

TN SSLC Exam Pattern at a Glance

Why Book-Back Questions Matter

Tamil Nadu Board questions are drawn directly from Samacheer Kalvi textbooks. Unlike CBSE where questions can be applied differently, TN SSLC papers closely mirror book-back exercises. If you solve every book-back question thoroughly, you have covered 70 to 80 percent of the likely paper.

Mathematics Important Questions (100 marks)

Maths carries the full 100 marks as theory. The paper has four parts with 1-mark, 2-mark, 5-mark, and 8-mark questions.

Algebra (25-28 marks)

• Find the GCD and LCM of two polynomials using factorisation. (5 marks)
• Solve a quadratic equation using the quadratic formula. Verify using the sum and product of roots. (5 marks)
• Form a quadratic equation whose roots are given (e.g., 3 and -5). (2 marks)
• Find the 10th term and sum of first 20 terms of an arithmetic progression. (5 marks)
• Solve simultaneous equations graphically — plot and find the point of intersection. (8 marks — appears most years)
• Matrix multiplication: multiply a 2x2 matrix by another 2x2. Verify associative property. (5 marks)

Geometry (20-22 marks)

• Prove the Basic Proportionality Theorem (Thales' theorem). (8 marks — guaranteed)
• Construct a triangle similar to a given triangle with a scale factor of 3/5. (5 marks)
• Prove that the tangent to a circle is perpendicular to the radius at the point of contact. (5 marks)
• Find the area of a triangle using coordinate geometry (given three vertices). (2 marks)
• Section formula: find the point dividing a line segment in a given ratio. (2 marks)

Trigonometry (15-18 marks)

• Prove that (1 + tan²θ)/(1 + cot²θ) = tan²θ. (5 marks)
• From the top of a 60 m building, the angles of depression of two cars on opposite sides are 30° and 45°. Find the distance between the cars. (8 marks — heights and distances)
• Evaluate: sin 60° cos 30° + cos 60° sin 30°. (2 marks)

Statistics and Probability (12-15 marks)

• Find the standard deviation of grouped data using step-deviation method. (8 marks)
• Calculate the mean and median from a frequency distribution table. (5 marks)
• Probability of drawing a specific card from a well-shuffled pack of 52 cards. (2 marks)

Mensuration (10-12 marks)

• A solid is made by combining a cylinder and a cone of the same base radius. Find the total surface area and volume. (8 marks)
• A hemispherical bowl of radius 14 cm is filled with water. Find the volume of water. (2 marks)

Science Important Questions (75 marks theory + 25 practical)

Physics (25 marks theory)

• Electricity: State Ohm's law. An electric heater of resistance 8Ω draws 15A. Find voltage and power. (5 marks)
• Light: A convex lens of focal length 15 cm forms an image at 60 cm. Find object distance and magnification. (5 marks)
• Nuclear Physics: What is nuclear fission? Explain with the example of Uranium-235. (2 marks)
• Acoustics: Explain how the human ear works. Draw a labelled diagram. (5 marks)

Chemistry (25 marks theory)

• Chemical Reactions: Write balanced equations for: (a) burning magnesium in air, (b) reaction of zinc with dilute HCl, (c) thermal decomposition of calcium carbonate. Classify each. (5 marks)
• Periodic Classification: How do metallic character and electronegativity vary along a period and down a group? Explain with examples. (5 marks)
• Carbon and Its Compounds: Write structural formulae for the first four members of the alkane series. What is a homologous series? (5 marks)
• Solutions: Define: (a) saturated solution, (b) unsaturated solution, (c) supersaturated solution. How does solubility of a solid change with temperature? (2 marks)

Biology (25 marks theory)

• Life Processes: Draw a neat labelled diagram of the human excretory system. Explain the structure and function of a nephron. (5 marks)
• Reproduction: Explain vegetative propagation with three examples. What are the advantages? (5 marks)
• Heredity: Explain Mendel's monohybrid cross experiment. What ratio did he observe in F2? Draw a Punnett square. (5 marks)
• Plant Physiology: Describe the process of photosynthesis. Write the balanced chemical equation. What are the factors affecting it? (5 marks)

Tamil Important Questions (100 marks)

Prose and Poetry (40-45 marks)

• Explain the theme and moral of the given prose passage. (5 marks — from prescribed lessons)
• Write the summary of a given poem in 100 words. (5 marks)
• Answer the context questions from any three prescribed prose lessons. (2 marks each)

Grammar (25-30 marks)

• Identify and correct grammatical errors in given sentences. (2 marks)
• Vilaimaatram (suffix changes), Verumoli, Thodarmoli exercises. (2 marks each)
• Peyarchchol (synonyms) and Ethirchchol (antonyms) from the textbook. (1 mark each)

Composition (20-25 marks)

• Write an essay on a given topic in 200 words. (8 marks)
• Write a formal letter: application for a leave, complaint letter, or letter to a friend. (5 marks)
• Write a dialogue between two people on a social topic. (5 marks)

English Important Questions (100 marks)

Prose and Poetry (35-40 marks)

• Read the passage and answer comprehension questions. (5 marks — unseen passage)
• Answer context questions from prescribed prose: identify the speaker, explain the significance, and give your opinion. (2 marks each)
• Explain the central theme of a given poem with reference to the text. (5 marks)
• Paraphrase a given stanza in your own words. (5 marks)

Grammar (25-30 marks)

• Transformation of sentences: active to passive, direct to indirect speech, simple to complex to compound. (2 marks each)
• Fill in the blanks with appropriate prepositions, articles, and tense forms. (1 mark each)
• Identify parts of speech, subject-verb agreement corrections. (1 mark each)

Composition (25-30 marks)

• Write a paragraph on a given topic in 150 words. (5 marks)
• Write a formal letter or email. (8 marks)
• Write a report on a school event. (5 marks)
• Complete the dialogue with appropriate responses. (2 marks)

Social Science Important Questions (100 marks)

History (25 marks)

• Describe the role of Mahatma Gandhi in the Indian independence movement. (8 marks)
• Explain the causes and consequences of World War I. (5 marks)
• Write about the Non-Cooperation Movement: causes, programme, and withdrawal. (5 marks)
• Compare the French Revolution and the Russian Revolution. (5 marks)

Geography (25 marks)

• Describe the monsoon climate of India. What are the seasons? (5 marks)
• Types of agriculture in India: subsistence farming vs commercial farming. (5 marks)
• Locate and mark on the outline map: major rivers, mountain passes, mineral deposits. (8 marks)
• Water resources of India: conservation methods. (5 marks)

Civics (25 marks)

• Explain the Fundamental Rights guaranteed by the Indian Constitution. (5 marks)
• What are the functions of the Indian Parliament? (5 marks)
• Role of local self-government: Panchayati Raj system. (5 marks)

Economics (25 marks)

• What is globalisation? How has it affected the Indian economy? (5 marks)
• Explain the functions of the Reserve Bank of India. (5 marks)
• Difference between public sector and private sector with examples. (5 marks)

Subject-Wise Priority Chapters

Last 30 Days Study Strategy

For more preparation strategy, see our Tamil Nadu SSLC last 45 days plan and TN Board Class 10 complete guide.

Frequently Asked Questions

Are TN SSLC questions taken directly from Samacheer Kalvi textbooks?

Yes. The vast majority of questions come directly from the textbook exercises (book-back questions) or are close variations. Mastering book-back questions is the most effective strategy.

How many previous year papers should I solve?

At least 5. TN Board tends to repeat question patterns across years. You will notice the same types appearing with different numbers.

Is Science practical included in the board exam total?

Yes. Science is 75 marks theory and 25 marks practical/internal assessment. The practical exam is held in February before theory exams. Prepare for both.

What is the best way to score in the 8-mark questions?

Write detailed answers with diagrams where relevant. Use step-by-step working in Maths. For Social Science, use subheadings and points rather than long paragraphs.

Should Tamil medium students also practice English answers?

Focus on your exam medium. However, understanding key Science and Maths terms in English helps when using reference materials and studying smart with mixed resources.

How important is map work in Social Science?

Very important. Map questions carry 5 to 8 marks and are the easiest to score. Practice with outline maps of India and Tamil Nadu weekly.

Related Guides

• Tamil Nadu SSLC Last 45 Days Subject Wise Plan
• Tamil Nadu SSLC Chapter Wise Weightage
• Tamil Nadu HSC Class 12 Maths Weightage
• Board Exam Answer Sheet Write Maximum Marks
• Board Exam Time Management Strategy
• How to Study Smart Not Hard Indian Students

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