Class 9 Chemistry -Guess paper 2025-26

                                        GUESS PAPER 2025- 26 

Short Questions (50) important ; 

1. Definition of atomic mass.
2. Properties of acids and bases.
3. Difference between isotopes and isobars.
4. Rutherford’s gold foil experiment.
5. Charles’s Law.
6. Atomic theory by Dalton.
7. Types of chemical bonds.
8. Molarity and molality.
9. Law of conservation of mass.
10. Definition of an ion.
11. Boyle’s Law.
12. Difference between organic and inorganic compounds.
13. Definition of a catalyst.
14. Types of reactions.
15. Periodic table and its classification.
16. Electrolysis of water.
17. Balancing a chemical equation.
18. Difference between exothermic and endothermic reactions.
19. Hard and soft water.
20. Solubility and factors affecting solubility.
21. Avogadro’s number.
22. Definition of pH.
23. Ionic vs covalent compounds.
24. Types of hybridization.
25. Difference between saturated and unsaturated hydrocarbons.
26. Oxidation and reduction reactions.
27. Properties of metals.
28. Properties of non-metals.
29. Role of a catalyst in a chemical reaction.
30. Boyle’s Law vs Charles’s Law.
31. Law of constant composition.
32. Difference between an alkane, alkene, and alkyne.
33. Definition of entropy.
34. Role of enzymes in biochemical reactions.
35. Law of multiple proportions.
36. Electronegativity and its trend.
37. Preparation of hydrogen gas.
38. Types of chemical bonds.
39. Atomic radius and its trend.
40. Molecular mass calculation.
41. Quantum numbers.
42. Ionization energy.
43. Law of chemical equilibrium.
44. Definition of acids and bases according to Bronsted-Lowry.
45. Preparation of oxygen gas.
46. Preparation of nitrogen gas.
47. Saponification reaction.
48. Difference between aliphatic and aromatic compounds.
49. Nuclear fission and fusion.
50. Properties of noble gases.

Long Questions (15) important ;

1. Explain the structure of an atom with reference to quantum mechanics.
2. Discuss the laws of chemical combination in detail.
3. Describe the process of electrolysis with examples.
4. Explain the periodic law and the modern periodic table.
5. Discuss the factors affecting the rate of a chemical reaction.
6. Describe the different types of chemical bonds with examples.
7. Explain the collision theory of chemical reactions.
8. Discuss the preparation and properties of oxygen gas.
9. Explain the role of catalysts in industrial processes.
10. Describe the properties and uses of alkali metals.
11. Explain the concept of chemical equilibrium with Le Chatelier’s principle.
12. Discuss the various types of hydrocarbons with examples.
13. Explain the laws of thermodynamics in chemistry.
14. Describe the preparation and properties of hydrogen.
15. Discuss the concept of redox reactions with examples.