(4) an increase in wind speed. Answer: 1—(c), 2—(b), 3—(b), 4—(b), 5—(e), 6—(c), 7—(d), 8—(a), 9—(a), 10—(rf), 11 ~(b), 12—(a), 13-(b). His friend advised Akshay to use water-coolers and save electricity. (c) Shreya showed the value of concerned citizen and morally responsible behaviour. (a) because water is a good solvent Which of the following are matter? Answer: Question 7. What are the characteristics of the particles of matter? Enlist four properties of this state of matter. Question 1. Answer: Chair, air, almonds, and cold-drink. The characteristics of the particles of matter are: Evaporation causes cooling of inside air of cooler. Answer: Latent heat of fusion is the amount of heat energy required to change 1 kg of solid into liquid at its melting point. If you are a student of class 9 who is using NCERT Textbook to study Science, then you must come across Chapter 1 Matter in Our Surroundings. Answer: The temperature at which a solid melts to become liquid at the atmospheric pressure is called its melting point. Fragrance of an incense stick (agarbatti) lightened in one corner of a room, spreads in the whole room quickly. I. Explain in detail. Similar Classes. Arrange the following in decreasing order of force of attraction: Water, Salt, Oxygen, and give reasons. Therefore we feel pleasant sitting under the tree on a hot sunny day. For a better understanding of this chapter, you should also see Chapter 1 Matter in Our Surroundings Class 9 notes , Science. Matter can be classified as solid, liquid and gas on the basis of … (b) 373°C into K 4 373 + 273 = 646 K. Question 3. Why do we see water droplets collected on the outer surface of a glass container, containing ice? Answer: Solid. Matter In Our Surroundings The gas can fill the container. Answer: Tea in a saucer has larger surface area than in a cup. Try this amazing Quiz: Is Matter Around US Pure? Particles of matter attract each other because of the force of attraction. Answer: The rate of evaporation will increase with Answer: At room temperature, the molecules of water have some intermolecular force of attraction and the room temperature cannot provide sufficient heat for these molecules to overcome their force of attraction and therefore remain in liquid phase. (b) An iron almirah is a solid at room temperature because melting point of iron is higher than room temperature. Choose the correct option: How does the water kept in an earthen pot (matka) become cool during summer? Watch Now. Define latent heat of fusion. (3) On applying pressure and reducing temperature we can liquefy gases or change them into solid. (a) 300 K (b) 573 K Here we have given Class 9 NCERT Science Textbook Solutions for Chapter 1 matter in our Surroundings. Class 9 Science NCERT Textbook – Page 9 (b) We can get the smell of perfume sitting several metres away because perfume contain volatile solvent and diffuse faster and can reach people sitting several metres away. Have high density and and can not be diffused. Define latent heat of vaporization. You must attend the quiz and test your concepts and knowledge . Why does the naphthalene balls kept in stored clothes in our home disappear over a period of time? Login. (d) gases cannot diffuse in solids Free online mock tests for Chemistry, CBSE Class 9 Chemistry Matter In Our Surroundings Online Test Set A. 3. NCERT Textbook Questions – Page 10 a. water(l) b. ethanol(l) c. CO2(g) d. sugar(s) 2. easy availability. Answer: (a) Naphthalene balls disappear with time without leaving any solid, because naphthalene balls sublime and directly changes into vapour state without leaving any solid. Convert the following temperature to Celsius scale: Answer: The molecules of water present on the surface of the exposed area which are in very small fraction, gains the energy from the surrounding. Question 4. Science. Answer: Cotton has large number of pores, in which air is trapped. After you have studied lesson, you must be looking for answers of its questions. Question 5. Question 10. (c) 110°C (d) 90°C Answer: Ammonium chloride, camphor and naphthalene balls. Explain giving examples the various factors on which rate of evaporation depends. (a) water boils at 100°C (b) water boils at <100°C Answer: Question 12. Matter In Our Surroundings Class 9 Notes - Chapter 1. 1. NCERT Textbook for Class 9 Science – Page 3 It exists in the form of five basic elements, the Panch tatva – air, earth, fire , sky and water. Preview this quiz on Quizizz. Share. APSET 2020 Answer Key released @apset.net.in: Download PDF Provisional Key here; Raise Objections by 24 Dec. CBSE 10th & 12th Board Exam 2021: Big Announcement By Education Minister Ramesh Pokhriyal 'Nishank' - Watch Live Video Now! Answer: The outer walls of the cooler get sprinkled by water constantly. On a hot sunny day, why do people sprinkle water on the roof or open ground? Detailed answers to all the exercise questions provided here will help you understand the fundamental concepts involved in … 0% average accuracy. (b) Comment on: The rate of evaporation is faster with increased surface area. The particles have their state and starts vibrating freely and a stage reaches when the solid ice melts and is converted to liquid state at the same temperature i.e., 273 K. Question 19. Which of the following substances exhibit the strongest intermolecular forces of attraction? All NCERT textbook questions have been solved by our expert teachers. 2.SADRAS.KALPAKKAM 2. Seema took a 100 ml beaker and filled half the beaker with water and marked the level of water. 11. Answer: The gases have high compressibility. (c) solid changes into gas (d) gas changes into solid States of Matter Note: As per the revised CBSE curriculum, this chapter has been removed from the syllabus for the 2020-21 academic session. Temperature: The rate of evaporation increases with an increase in temperature. To get more of such useful articles for the preparation of CBSE Class 9 Annual Exam 2019, click here. (a) water at room temperature is a liquid. Test , Class 9, Chemistry, CBSE-Matter In Our Surroundings. (c) What value of Sita is reflected in the above case? NCERT Class 9 Science Chapters Free Quiz Chapter 1 – Matter in Our Surroundings Quiz Chapter 2 – Is Matter Around Us Pure Quiz Chapter 3 – Atoms and Molecules Quiz Chapter 4 – Structure of The Atom Quiz Chapter 5 – The Fundamental Unit of Life Quiz Chapter 6 – Tissues Quiz Chapter 7 – Diversity in Living Organisms Quiz […] Matter in Our Surroundings | MENTI QUIZ | Class 9 Chemistry | CBSE | ICSE | Akanksha Mam Myahi June 11, 2020 In this session of "Super Series", Akanksha Ma'am will be discussing the important MCQs from the chapter "Matter in Our Surroundings" MENTI QUIZ. NCERT Solutions for Class 9 Science (Chemistry) Chapter 1 – Matter in Our Surroundings is an important study material from the standpoint of your CBSE Class 9 Science examination. The conversion of gas into liquid is called Forgot Password? Convert the following temperatures to the Kelvin scale. UPSC IAS 2020 Exam: Click here to get the Complete 30 Days Study Plan to score high in Prelims. Actually, on dissolving, the particles of potassium permanganate get into the spaces between the particles of water. (c) temperature lower than boiling point This test is Rated positive by 85% students preparing for Class 9.This MCQ test is related to Class 9 syllabus, prepared by Class 9 teachers. Question 3. (c) 10.1325 x 105 Pa (d) 10.1325 x 106 Pa The characteristics of the particles of matter are following : (A) Matter consists of tiny particles which cannot be seen by an individual with naked eye. What are fluids? Question 4. Maths Resources. (a) boiling point 9th grade. 0 times. Answer: Sponge is a solid with minute pores in it. Why does temperature remain constant during the boiling of water even though heat is being supplied continuously? Chapter-wise NCERT Solutions for Class 9 Science Chapter 1 (Chemistry) Matter in Our Surroundings solved by Expert Teachers as per NCERT (CBSE) Book guidelines. Yogesh Punia. Matter In Our Surroundings . (b) the molecules use the heat to overcome the force of attraction This shows that the particles have spaces between them and are continuously moving on their own. This makes the pot cold and the water inside the pot cools by this process. 9th Science chapter Matter in Our Surrounding have many topics. Name the factors that affix l evaporation. Get chapter notes for CBSE Class 9 Science, chapter 1: Matter in Our Surroundings, to make an easy preparation for CBSE Class 9 Science Exam 2020. ‘ Buy Books. (b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density. 1. … (a) Why did the type burst? State the differences between solid, liquid and gas. Question 14. Define sublimation. Matter in Our Surroundings ; Quiz Details; Class/Course - Class IX Subject - Science Chapter - Matter in Our Surroundings . Density is lower than solids and can diffuse. Edit. Answer: Matter has 3 different states. Question 8. Answer: Milk drops dissolved in water and perfume sprayed in a room. All these topics are included in CBSE solved test papers of class 9 Science chapter Matter in Our … 9th Science chapter Matter in Our Surrounding have many topics. Answer: (a) The wet cloth gave the cooling effect to the pot, as the water in the cloth evaporated and evaporation causes cooling effect. Since, the heat energy is hidden in the bulk of the matter, it is called latent heat. Explain why does diffusion occurs more quickly in gases than in liquids? Neither have definite shape nor definite volume. Buy Books. Class 9 - Unit ObjectiveTest - Science - The Matter in Our Surroundings Objective Test Q1: Fill in the blanks a. Answer: (a) Difference in the characteristics of 3 states of matter. Force of attraction between particles is less strong. 105 J/kg free online Matter in Our Surroundings matter in our surroundings class 9 quiz proprofs compress it of Class 9, Chemistry, CBSE-Matter in Surroundings! 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