[NCERT Exemplar] Name the process which occurs when a drop of dettol is added to water. Answer: State the reason for this. Which gas is called dry ice? Kinetic energy of particles of water in three vessels A, B and C are EA, EB and EC respectively and EA > EB > EC. While heating ice in a beaker with a thermometer suspended in it, a student recorded the following observations: Comment on the following statements: This mock test of Matter In Our Surroundings for Class 9 helps you for every Class 9 entrance exam. Answer: A sample of water under study was found to boil at 102°C at normal temperature and pressure. Who do you think would be more comfortable and why? From the graph answer the following: Edit. Water as ice has a cooling effect, whereas water as steam may cause severe burns. (c) What is its boiling point? Why do we feel comfortable under a fan when we are perspiring? Making statements based on opinion; back them up with references or personal experience. 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. When a crystal of potassium permanganate is placed in a beaker containing water, its purple colour spreads throughout the water. Question 14. More transpiration requires more leaves. Why steam at 100°C is better for heating purposes than water at 100°C? Molecular motion decreases as water gets converted into ice. Online Test for Class 9 Chemistry Matter In Our Surroundings . Matter in Our Surroundings Class 9 Notes, Video Explanation, Question Answer. Science Class IX (Our Surroundings), Matter In Our Surroundings - I (NTSE / NSEJS). Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. On the other hand, in case of ice, the water molecules take energy from the body and thus, give a cooling effect. Question 5. 2 ratings. Temperature changes during evaporation. Answer: What characteristic of matter is illustrated by this observation? Question 1. Matter can exist in three physical states – solid, liquid and gases. Edit. In which of the […] Question 1. Why? Wind speed: The rate of evaporation increases with increase in wind speed. Move about the room and smell the fragrance of the incense sticks. Why do solids have a regular geometrical shape? Assertion: Desert cooler do not work efficiently during rainy season. [NCERT Exemplar] Print; Share; Edit; Delete; Host a game. Answer: This experiment shows that lesser the density, faster the rate of diffusion. Question 3. An increase in the temperature by putting the shirt under the sun. Question 13. Also, discover important questions Define density and give its SI unit. Question 4. Save. Question 3. This page is prepared by academic team of entrancei for Chapter 1 - Matter in Our Surroundings.Get MCQ based objective questions and HOT Questions with solution for Chapter 1 - Matter in Our Surroundings. Please be sure to answer the question. Question 5. 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. Question 5. Suggest an activity to show that the rate of diffusion of liquids decreases with increase in density of the liquid. Which region contains all liquids? Delete Quiz. Here you can get Class 9 Important Questions Science based on NCERT Text book for Class IX.Science Class 9 Important Questions are very helpful to score high marks in board exams. Answer: Reason: Evaporation is a surface phenomenon. [NCERT Exemplar] The entire NCERT textbook questions have been solved by best teachers for you. The rate of evaporation increases with an increase in surface area because evaporation is a surface phenomenon. Answer: Question 8. (a) State the change(s) observed between 2-3 min. Aquatic animals using oxygen dissolved in water during respiration. 1. It breaks on applying excessive force. (b) What is the melting point of the substance? Based on CBSE and CCE guidelines. ‘Z’ is liquid at room temperature. and name the process involved. Therefore, it is quite important to ensure that this chapter is studied thoroughly. Live Game Live. When a person has fever, his body temperature becomes more than the normal body temperature. Answer: Solution : There are 3 states of matter. Question 1. Chair, air, love, smell, hate, almonds, cold, cold drink, smell of perfume, thought. Question 4. Describe the continuous motion of particles of matter with the help of an activity. On further heating, the temperature of the water would increase. Classify the following into osmosis/diffusion. Answer: Here is, By submitting this form, you agree to the, Take Tests between 11:00 pm (IST) and 7:00 am (IST). When we heat the mixture, energy supplied is utilised in melting the ice and the temperature does not change till all the ice melts because of latent heat of fusion. Determination of boiling point of water: Question 3. (i) Layers of particles can slip and slide over one another easily. Multiple Choice Questions Question 10. Name the property of the gaseous state exhibited by this observation. Spreading of smell of cake being baked throughout the house. The questions have been prepared to cover all the important topics of the chapter. When we press it, the air is expelled out and we are able to compress it. Answer: 0. Matter In Our Surroundings 15 Questions | By Jagranjosh | Last updated: Sep 16, 2020 | Total Attempts: 4666 Questions All questions 5 questions 6 questions 7 questions 8 questions 9 questions 10 questions 11 questions 12 questions 13 questions 14 questions 15 questions ‘A’ is a gas. This is because it directly gets converted into gaseous state without passing through liquid state on decreasing the pressure to 1 atmosphere. (b) Air around us cannot hold more than a definite amount of water vapour at a given temperature which is known as humidity. Gas < Liquid < Solids. They do not have fixed shape and fixed volume. Density of a substance is defined as the mass per unit volume. 4. (a) Between 2-3 min, ice converts into water. According to the past trends and previous years question papers, this particular unit carries 23 marks out of 100. The temperature in the sunny area is higher than in the shade and evaporation takes place at a faster rate at high temperature. Name the process of each interconversion. 19 Multiple Choice Questions related to NCERT 9th Class (CBSE) Science: Matter in Our Surroundings Quiz:. (ii) Particles just move around randomly because of very weak force of attraction. Answer: Question 1: Large volume of compressed natural gas (CNG) is available in small cylinders to us due to its property of - high inflammability . After you have studied lesson, you must be looking for answers of its questions. Water vapour, wax or, ethyl alcohol. Answer: Question 7. Answer: Chemistry. Humidity: The rate of evaporation decreases with increase in humidity. Answer: Question 2. (i) Liquid Answer: It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Answer: MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. Question 1. Question 9. Question 10. Why do we see water droplets on the outer surface of a glass containing ice cold water? (ii) Compressible, no definite volume How is the latent heat of fusion related to the energy exchange that takes place during this change of state? Explain what happens to the molecular motion and energy of 1 kg of water at 273 K when it is changed into ice at same temperature. by george_m_tms_31680. Explain how the rate of evaporation of a liquid is affected with: Question 9. Region C. Question 1. Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume. Chair and almond are forms of matter in the solid state. Answer: ... 10 Questions Show answers. Question 4. Question 3. Shrinking of grapes kept in thick sugar syrup. Matter in our surroundings Class 9 Science Chapter 1 Explanation in Hindi, Imp Questions and Answers. This is because the solid particles diffuse in the water. Drop a crystal of copper sulphate or potassium permanganate into a glass of hot water. Define the term ‘matter’. Extra Questions for Class 9 Science Chapter 1 Matter in Our Surroundings with Answers Solutions. Question 5. The students should read these basic concepts to gain perfection Question 14. 30 seconds . Answer: When dettol is added to water, diffusion takes place. The latent heat of fusion of ice in SI unit is 3.35 × 105 J/kg. Answer: Answer: Move about the room and smell the fragrance of the incense sticks. Question 15. (a) What is the physical state of the substance at the points A, B, C and D? Which of the following (shown in figure given below) would correctly represent the result? 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. Matter in Our Surroundings Class 9 Notes, Video Explanation, Question Answer. This contains 10 Multiple Choice Questions for Class 9 Matter In Our Surroundings (mcq) to study with solutions a complete question bank. Heating purposes than water at 100°C wondered whether the temperature by putting shirt... 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