9th Class Chemistry Guess Paper 2012
SECTION “A” – (Multiple Choice Questions – MCQs)
Q.1. Choose the correct answers.
SECTION “B” – (Short Answer Questions)
Q.2. Write three contribution of any three Muslim scientists in the field of Chemistry?
Q.3. Define Chemistry. Name and define any three branches of Chemistry.
Q.4. What is a scientific method? Write the names of its four stages and describe them.
Q.5. State the following laws.
i. Modern Periodic Law
ii. Law of Conservation of Matter
iii. Dobereiner’s law of Triads
Q.6. Define the following
i. Avogadro’s Number
ii. Isotopes
iii. Mass
iv. Mass Number
v. Saturated Solution
vi. Fusion
vii. Diffusion
Q.7. Define Acid and Base. State Lewis Theory, Arrhenius Theory and Bronsted Lowery concept about acids and bases with one example and equations of each?
Q.8. Write four postulates of Dalton’s Atomic Theory and Rutherford’s Atomic Model.
Q.9. Write five characteristics of Cathode Rays?
Q.10. Write three characteristics of elements of group I-A, VII-A and VIII-A of periodic table?
Q.11. Draw a diagram of discharge tube to show the discovery of Electron?
Q.12. State Faraday’s first and second laws of electrolysis?
Q.13. Define Solubility. Write the names of the factors that affect solubility and describe the effect of temperature of solubility?
Q.14. What is the electroplating? With the help of a labeled diagram explain how you would electroplate an iron spoon with nickel?
Q.15. What is meant by Radioactivity? Draw a labeled diagram showing the separation on Alpha, Beta and Gamma rays. Also write three properties of each of these rays?
Q.16. Write three differences of following
i. Covalent Bond and Coordinate Covalent Bond
ii. Oxidation and Reduction
iii. Metals and Non-metals
Q.17. Define the following
i. Negativity
ii. Chemical Bond
iii. Sublimation Brownian Movement
Q.18. Define pH. Write three uses and advantages of pH in daily life.
Q.19. What is chemical reaction? Define following chemical reaction with one example.
i. Double Displacement Reaction
ii. Decomposition Reaction
iii. Single Displacement Reaction
Q.20. Write three general characteristics of Transition Elements.
Q.21. What is Thermo Chemical Reaction? Write the names of its two kinds and define them?
Q.22. Define Ozone. How can Ozone be prepared from Oxygen?
Q.23. What are Soaps? Describe two raw materials used in the preparation of Soap?
Section “C” – (Descriptive Answer Questions)
Q.24 (a) How is Ammonia Gas prepared in the laboratory? Explain the process giving a balanced chemical equation and a labeled diagram?
Q.24 (b) Describe the laboratory method for the preparation of chlorine with a balanced chemical equation and draw labeled diagram?
Q.24 (c) Define the process of filterization of petrochemicals with the help of a labeled diagram?
Q.25 (a) Describe with the help of a labeled diagram the construct and working of a Lead Storage Batter?
Q.25 (b) Define the preparation of Nitric Acid (HNO3) through Ostwald’s Process with the help of balanced chemical equations?
Q.25 (c) What is Aqua Regia? Why the gold absorbed in it? Also define Silica Gel? Give its two uses?
Q.26 (a) Define Allotropy? Write the names of any two crystalline forms of carbon and two characteristics of each of them?
Q.26 (b) Write four uses of sulphuric acid and hydrochloric acid?
Q.26 (c) What are Oxides? Write four kinds of normal oxides.
Q.27 (a) State the following laws
i. Law of Constant Composition
ii. Law of Multiple Proportions
iii. Graham’s law of Diffusion of Gases
iv. Newlands law of Octaves
Q.27 (b) Define Salt and describe the three group of salt with examples?
Q.27 (c) Define Exothermic and Endothermic Reactions and write one example of each with a balanced chemical equation.