She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. (i) Layers of particles can slip and slide over one another easily. Answer: (a) Between 2-3 min, ice converts into water. Question 4. Which of the following diffuses faster? Question 10. Save. (c) Sponge though compressible is a solid. Question 7. Which of the following are matter? Q. This test is a practice test of Matter in our Surroundings (CPE). (b) Between 30-35 min., the temperature remains constant. Online Test for Class 9 Chemistry Matter In Our Surroundings . Its particles move very rapidly in all the directions and fill the kitchen as gases completely fills the vessel. They do not have fixed shape and fixed volume. Download free printable assignments worksheets of Science from CBSE NCERT KVS schools, free pdf of CBSE Class 9 Science Matter in Our Surroundings Assignment Set B chapter wise important exam questions and answers CBSE Assignment for Class 9 Science - Matter in Our Surroundings. (ii) Particles just move around randomly because of very weak force of attraction. To learn more, see our tips on writing great answers. Matter in our surroundings DRAFT. (b) To demonstrate motion of particles of solid matter: Question 2. Gas < Liquid < Solids. Move about the room and smell the fragrance of the incense sticks. Edit. (d) Which portions of the graph indicates that change of state is taking place? Important NCERT Question from Matter in Our Surroundings Question 1: Which of the following are matters? Question 3. Gases are compressible because the intermolecular space is very large in gases, whereas liquids are not compressible because in liquids, the intermolecular space is less. (b) Air around us cannot hold more than a definite amount of water vapour at a given temperature which is known as humidity. NCERT 9th Class (CBSE) Science: Matter in Our Surroundings Quiz. In solids, the particles have highly ordered arrangement because the intermolecular forces between the particles are very strong. What happens when an inflated air balloon is pricked with a pin? Question 4. In which of the […] None of them. It is the amount of heat energy required to change 1 kg of liquid into gas at its boiling point. Matter in Our Surroundings – Assertion and Reason Questions. ENROLL . Which of the following (shown in figure given below) would correctly represent the result? Sahil Chhabra. Thus, moist strips will lower his body temperature. Temperature changes during evaporation. Sagnik Mitra. Therefore, the correct option is (d). Why do we see water droplets on the outer surface of a glass containing ice cold water? Answer: Question 7. 23 ratings. If we put strips of wet cloth on the forehead of a person suffering from high fever, the water evaporates taking heat from the body. Conditions that can increase the rate of evaporation of water are: Question 10. Matter can exist in three physical states – solid, liquid and gases. INCOMMING TRAFFIC. TC < TB < TA , the kinetic energy of particles is greater at higher temperature. The water will cool initially till it reaches 0°C, the freezing point. Matter in Our Surroundings: Important Questions and Preparation Tips. A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature <0°C). Water as ice has a cooling effect, whereas water as steam may cause severe burns. The temperature-time graph given alongside shows the heating curve for pure wax. Alka was making tea in a kettle. Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12, Extra Questions for Class 9 Science Chapter 1 Matter in Our Surroundings. The heat involved in the process is latent heat of vaporisation. 0. in continuous motion. (a) A-Solid state, by george_m_tms_31680. Question 5: The number of common states of matter is: 5. Who do you think would be more comfortable and why? Therefore CBSE Board decided to dedicate a large part … Why do wet clothes dry quickly in the sun than in the shade? (c) What is its boiling point? Temperature: The rate of evaporation increases with increase in temperature. Chapter 1 Matter in Our Surroundings MCQ Test Class 9 Science Online Courses, MCQ's on Matter in Our Surroundings, Videos available on LearnFatafat Solid CO2 is known as dry ice. What do you understand by the term ‘latent heat of fusion’? Answer: This heat energy absorbed without showing any rise in temperature is given the name latent heat of fusion/latent heat of vaporisation. While heating ice in a beaker with a thermometer suspended in it, a student recorded the following observations: Bank Class - IX). Answer: Based on CBSE and CCE guidelines. Answer: Reason: The particles of gas have greater space between them compared to solids. So, if the air is already rich in water vapour, it will not take up more water; therefore, rate of evaporation of water will decrease. Matter in Our Surroundings CBSE Class 9 Science Chapter 1 - Complete explanation and Notes of the chapter 'Matter in Our Surroundings'.. The primary objective here was to improve the evaluating and analytical skills of a student. Yes, it is a solid. Play . Prepared by teachers of the best CBSE schools in India. In which of the following, the particles have highest forces of attraction? [NCERT Exemplar]. Question 8. This means that they are also loosely bound to some extent. Solution: Chair – It is matter Air – It is matter Love – It is not matter […] MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. (a) Evaporation produces cooling as the particles at the surface of the liquid gain energy from the Hindi Matter in Our Surroundings (Hindi) Matter - Nature and Behaviour Class 9 Science Chemistry Matter in our surroundings Chapter 1. Arrange the temperatures, TA, TBand TC of water in the three vessels in increasing order. 4. Assertion: Solids have a fixed shape but no fixed volume. Drop a crystal of copper sulphate or potassium permanganate into a glass of hot water. Give two ways in which melting points and boiling points can be useful. Goa Board Class 9 Solutions for Chemistry – Matter in Our Surroundings (English medium) Page No. The entire NCERT textbook questions have been solved by best teachers for you. When a person has fever, his body temperature becomes more than the normal body temperature. The diagram below shows burning of an oil lamp. MCQs from CBSE Class 9 Science Chapter 1: Matter in Our Surroundings 1. Do not stir the solution and allow the crystals to settle at the bottom. Answer: Question 6. Question 1. Question 11. Answer: A lot of students tend to only focus on memorizing information and relying on cramming learning. Which one of the following sets of phenomena would increase on raising the temperature? Move about the room and smell the fragrance of the incense sticks. Share practice link. Answer: This experiment shows that lesser the density, faster the rate of diffusion. We can also move our hands through water or liquid matter but not as freely as we can in the air. There are around 3-5 solved test papers in each chapter. Rate of evaporation increases if wind speed increases. Question 2. Latent heat of solidification is given off. Earthworm dying on coming in contact with common salt. Question 7. Take crystals of ammonium chloride in a china dish. More transpiration requires more leaves. Matter in Our Surroundings CBSE Class 9 Science Chapter 1 - Complete explanation and Notes of the chapter 'Matter in Our Surroundings'.. When dettol is added to water, diffusion takes place. This test is Rated positive by 87% students preparing for Class 9.This MCQ test is related to Class 9 syllabus, prepared by Class 9 teachers. Enlist four properties of this state of matter. Answer: Molecular motion decreases as water gets converted into ice. D1D2—Latent heat of vaporisation Chapter 1 – Matter in Our Surroundings is a part of Unit 1: Matter – Its Nature and Behavior. According to the past trends and previous years question papers, this particular unit carries 23 marks out of 100. Note down the temperature when ice just starts melting. You are given the following substances with their melting and boiling points. Correct Option is : 2. Question 16. Why are gases compressible but not liquids? 7 lessons. Kinetic energy of particles of water in three vessels A, B and C are EA, EB and EC respectively and EA > EB > EC. ‘A small volume of water in a kettle can fill a kitchen with steam’. (i) Incompressible, no fixed shape C—liquid state, Live Game Live. Water, NaCl (solid), ice or, wax. (d) Ice is solid at 0°C, while water is liquid at room temperature. This is possible only when you have the best CBSE Class 09 Science study material and a smart preparation plan. CBSE Chapter 1 Matter In Our Surroundings HOTs Questions for Class 9. Evaporation takes place at all temperatures. Rate of evaporation increases with rise in temperature. Answer: Question 1. (e) Sugar crystals dissolve faster in hot water than cold water because hot water molecules have more kinetic energy. Assertion: Diffusion occurs readily in gas as compared to solids. (i) Liquid (e) A1B1—Latent heat of fusion. (a) To demonstrate motion of particles in air: The fragrance produced due to burning of incense sticks is due to movement of vapours produced A sample of water under study was found to boil at 102°C at normal temperature and pressure. (b) What is the melting point of the substance? (a) Name the changes in the terms of process P, Q, R and S? Correct Option is : 3. Question 4. Latent heat of evaporation of two liquids A and B is 100 J/kg and 150 J/kg respectively. Matter in Our Surroundings – Assertion and Reason Questions. To check whether the substance is pure or not. [NCERT Exemplar] Why steam at 100°C is better for heating purposes than water at 100°C? Edit. At this stage, the temperature will remain constant till all the water will freeze. CBSE Board introduced questions based on - Higher Order Thinking Skills (HOTs). This temperature is the melting point of ice. An increase in the surface area by spreading the shirt. Due to this, they strike faster on the particles of sugar than cold water molecules. Reason: Evaporation is a surface phenomenon. Download free printable worksheets Chemistry pdf of CBSE and kendriya vidyalaya Schools as per latest syllabus in pdf, CBSE Class 9 Chemistry Worksheet - Matter In Our Surrounding - Practice worksheets for CBSE students. Register online for Science tuition on Vedantu.com to … Answer: Matter is defined as anything that occupies some space and has definite mass. Question 4. Explain why. Describe the continuous motion of particles of matter with the help of an activity. Answer: Steam at 100°C is better for heating purposes than water at 100°C because the energy of 1 kg of steam at 100°C is 22.6 × 105 joule which is more than that of 1 kg of water at the same temperature. We observe that honey diffuses slowly as compared to ink. Matter in Our Surroundings Class 9 Notes, Video Explanation, Question Answer. Name the process which occurs when a drop of dettol is added to water. The sweat is readily evaporated from the body by the air from the fan. Answer: 2. Solo Practice. Question 2. Question 14. Therefore, solids have a regular geometrical shape. When 50 g of sugar is dissolved in 100 mL of water, there is no increase in volume. Answer: SURVEY . Finish Editing. Answer: Question 1. How does evaporation differ from boiling? Boiling takes place in the entire body of the liquid. Assertion: Desert cooler do not work efficiently during rainy season. The temperature does not change during boiling. 9th grade. Question 1. The high energy of water molecules in steam is transformed as heat and may cause burns. The amount of heat that is required to change 1 kg of solid into liquid at atmospheric pressure without any change in temperature at its melting point, is known as latent heat of fusion. Place few lighted incense sticks in a corner of a room. 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