Title Class 09 Science 1 Matter in Our Surroundings.pdf ✅

Matter in Our Surroundings DPP-01 [Topic: Characteristics of Particles of Matter] Very Short Answer Type Questions 1. Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close. 2. A diver is able to cut through water in a swimming pool. Which property of matter does this observation show? 3. A substance has no mass, can we consider it as matter? 4. Why is light not considered as a form of matter? 5. Is smell of clove or cardamom (Elaichi) a form of matter? 6. What is the effect of temperature on the rate of diffusion? 7. Which term is used to describe the mixing of copper sulphate and water in a beaker? 8. Even two or three crystals of KMnO4 (potassium permanganate) can impart colour to a very large volume of water. Which characteristic property of the particles of matter is illustrated here? 9. A piece of chalk can be broken easily but iron cannot, why? 10. What name is given to the particles of matter? Short Answer Type Questions 11. Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume. 12. What are the characteristics of the particles of matter? 13. (i) When common salt is dissolved in water, what will be the change in volume and why? (ii) Write one similarity between the three states of matter. 14. Can solid diffuse in solids? Give an example.
Matter in Our Surroundings DPP-02 [Topic: Physical States of Matter] Very Short Answer Type Questions 1. What is physical state of water at: (a) 250∘ C, (bb)100∘ C ? 2. Rubber band changes its shape. Is it a solid? 3. Name the property of gases due to which it is possible to fill CNG in cylinders for using as a fuel in car. 4. The melting point of these solids X, Y and Z are 298K, 314K and 398K, respectively. Arrange these in increasing order of their interparticle forces of attraction. 5. How do we liquify the gases? 6. Which gas is supplied in liquified form: (i) at home, (ii) in hospitals. 7. Compare the forces of attraction between iron, rubber band and chalk. 8. Arrange sugar, water and oxygen in increasing order of forces of attraction between their particles. 9. Which diagram shows the arrangement of particles inside the balloon filled with a mixture of hydrogen and bromine? Short Answer Type Questions 10. The mass per unit volume of a substance is called density. (density = mass/volume). Arrange the following in order of increasing density - air, exhaust from chimneys, honey, water, chalk, cotton and iron. 11. Give reasons for the following: (i) A gas completely fills the vessel in which it is kept. (ii) A gas exerts pressure on the walls of the container. (iii) A wooden table should be called a solid. (iv) We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert.
12. Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why? 13. What is the full form of CNG? Mention its one property that makes it so important? 14. Sponge is a solid but still it can be compressed, why? 15. Among solids, liquids and gases which one has: (i) Maximum forces of attraction between particles. (ii) Maximum space in between the particles. Give reason in support of your answer. 16. What is tincture of iodine? Identify solute and solvent in it. 17. Ice, water and steam are three states of a substance and not different substances. Justify. 18. Arrange the three states of matter in the increasing order of: (i) rate of diffusion, (ii) motion of particles. 19. Why is iron almirah solid at room temperature? Give two reasons. 20. Cotton being a solid, floats on water, why? 21. Diffusion of a gas in water is essential. Explain. 22. Classify the following substances present in our body into solids, liquids and gases: Bones, Blood, Teeth, Air in Lungs, Water 23. What is meant by pressure of gas? OR Why do gas exert pressure? 24. Write the characteristic responsible for: (i) Smell of perfume spreads in the room. (ii) Water takes the shape of the container in which it is kept. 25. What will happen if inflated balloon is kept in a fridge and why? Long Answer Type Question 26. (i) Tabulate the differences in the characteristics of states of matter. (ii) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.