10th Class Chemistry Guess Paper 2025 | 2nd Annual Exam | Punjab Board Important Questions

 

10th Class Chemistry Important Questions 2025 | Sir Shahbaz Nawaz Notes

🔍 Looking for the most important Chemistry questions for Class 10? You're at the right place! Carefully curated by Sir Shahbaz Nawaz, these handpicked short and long questions from Units 9 to 16 cover all the key topics based on the latest exam trends.

📌 Note: This guess paper is based on previous board patterns and expert analysis. For best results, pair this with full syllabus preparation.

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🔹 Unit 9: Chemical Equilibrium – Most Important Questions

📘 Short Questions:

1. What is the difference between reversible and irreversible reactions?
2. Differentiate between dynamic and static equilibrium.
3. Define the Law of Mass Action.
4. What is an equilibrium constant?
5. How is dynamic equilibrium established?
6. How does active mass affect the rate of reaction?
7. How can the direction of a chemical reaction be predicted?

📗 Long Questions:

1. Explain complete and incomplete reactions. Why don't all reactions go to completion?
2. Describe macroscopic characteristics of forward, reverse, and dynamic equilibrium reactions.
3. State and derive the Law of Mass Action for a general chemical reaction.
4. Discuss the significance of the equilibrium constant in chemical reactions.
5. Define a reversible reaction with a detailed example and a graphical representation.

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🔹 Unit 10: Acids, Bases & Salts – Important Questions

📘 Short Questions:

1. Define acids and bases according to Arrhenius theory.
2. What are the limitations of the Arrhenius concept?
3. Briefly explain the Bronsted-Lowry theory.
4. Differentiate between Lewis acid and Lewis base.
5. Why is the H⁺ ion considered a Lewis acid?
6. State four uses of sulfuric acid.
7. What is pH? What is the pH of pure water?
8. Define the pH of a solution.
9. What are indicators in chemistry?
10. Define salts with two examples.
11. State four common uses of salts.
12. List four uses of sodium silicate, calcium chloride, and calcium oxide.
13. Differentiate between acidic and basic salts.

📗 Long Questions:

1. Compare physical properties of acids and bases with examples.
2. Explain Arrhenius theory of acids and bases with limitations.
3. Describe the Lewis concept of acids and bases.
4. What are indicators? How do they help determine pH in different solutions?
5. Define salts, their types, characteristics, and key uses.
6. List applications of commonly used bases.
7. Explain Bronsted-Lowry concept with relevant examples.

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🔹 Unit 11: Organic Chemistry – Short Questions Only

📌 Note: No long questions expected from this unit in exams.

📘 Short Questions:

1. What is the vital force theory?
2. Define organic compounds.
3. Explain the concept of catenation.
4. What is a molecular formula? Give an example.
5. What is the functional group of alcohol?
6. Describe the formation of coal.
7. Define functional group in organic chemistry.
8. What is a dot and cross formula?
9. What are open-chain (acyclic) compounds?
10. Define alicyclic (non-benzenoid) compounds.
11. What are heterocyclic compounds? Give one example.
12. Define isomerism. How many isomers does pentane have?

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🔹 Unit 12: Hydrocarbons – Important Questions

📘 Short Questions:

1. Define hydrocarbons.
2. Difference between open-chain and closed-chain hydrocarbons.
3. Define saturated and unsaturated hydrocarbons.
4. Why are alkanes called "paraffins"?
5. What is hydrogenation of alkenes?
6. Uses of ethane and ethene.

📗 Long Questions:

1. Define hydrocarbons and explain their classification.
2. Describe the preparation methods of alkanes and alkenes.
3. Discuss the physical properties of alkenes and alkynes.
4. Write uses of methane, ethane, ethene, and acetylene.
5. Describe chemical reactions of alkanes.

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🔹 Unit 13: Biochemistry – Most Asked Questions

📘 Short Questions:

1. Define biochemistry.
2. Define polysaccharides and state their properties.
3. What are the characteristics of monosaccharides?
4. Define amino acid and write its general formula.
5. Differentiate between essential and non-essential amino acids.
6. Mention the sources and uses of Vitamin A and D.
7. List uses of carbohydrates.
8. Differentiate between ghee and oil.
9. What is the function of DNA?
10. How many types of vitamins are there?
11. How does RNA act like a messenger?

📗 Long Questions:

1. Define monosaccharides and oligosaccharides with characteristics.
2. Describe the sources and uses of carbohydrates.
3. What are amino acids? How do they build proteins?
4. Discuss the sources and importance of proteins and lipids.
5. Define vitamins. Explain their types, uses, sources, and deficiency diseases.
6. Define carbohydrates. How are monosaccharides prepared?

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🔹 Unit 14: Environmental Chemistry – Important MCQs & Questions

📘 Short Questions:

1. What is the atmosphere? Name its layers.
2. Difference between environment and atmosphere.
3. Main gases in the troposphere.
4. What are pollutants? Difference between primary and secondary pollutants.
5. Define greenhouse effect.
6. What is global warming? Mention its effects.
7. Why is CO₂ called a greenhouse gas?
8. How does CO₂ cause atmospheric warming?
9. Effects of acid rain.
10. Define ozone hole. Where was it first detected?
11. Effects of ozone depletion.
12. Location of ozone layer.
13. How does acid rain increase soil acidity?
14. Why is carbon monoxide dangerous?
15. Natural emission of sulfur compounds.

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🔹 Unit 15: Water – Essential Chemistry Questions

📘 Short Questions:

1. How does water rise in plants?
2. State four properties of water.
3. What is capillary action?
4. Why is a water molecule polar?
5. Differentiate between hard and soft water.
6. Explain Clark’s method to remove temporary hardness.
7. What are boiler scales and how are they removed?
8. Why are pesticides and fertilizers used?
9. Why are non-polar substances insoluble in water?
10. Disadvantages of detergents.
11. Name some water-borne diseases.
12. Define fluorosis.

📗 Long Questions:

1. Causes and types of water hardness, and removal methods.
2. Effects of industrial waste (effluents) on water.
3. Discuss the impact of water pollution on health and environment.
4. Explain waterborne diseases with examples.

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🔹 Unit 16: Metallurgy & Industrial Chemistry – Important Questions

📘 Short Questions:

1. Define metallurgy.
2. Difference between minerals and ores.
3. What is gravity separation?
4. Explain electromagnetic separation.
5. Define roasting. How is it performed?
6. Raw materials used in the Solvay process.
7. Advantages of Solvay’s process.
8. What is petroleum?
9. How is petroleum formed?
10. How is roasting carried out?
11. Difference between crude oil and residual oil.
12. Difference between diesel and fuel oil.
13. What are the raw materials for urea production?
14. How is NaHCO₃ converted into Na₂CO₃?

📗 Long Questions:

1. Describe electromagnetic separation, smelting, and bessemerization.
2. Explain the Solvay process for manufacturing sodium carbonate (including advantages and reactions).
3. Steps involved in the production of urea (three main steps).

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📝 Final Words from Sir Shahbaz Nawaz

✨ "اللہ کریم آپ کا حامی و ناصر ہو"

📺 Stay updated! Visit our YouTube Channel: Learn With SN for video lectures and more study tips.

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📌 Disclaimer:

• This guess paper is for quick revision purposes only.
• Full preparation is necessary for scoring top marks.
• These questions are derived from previous papers and trends but are not guaranteed to appear in the exact form.

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📌 All notes are prepared by Sir Shahbaz Nawaz according to the latest Punjab Board syllabus and paper pattern.