Matter in Our Surroundings (हमारे आस पास के पदार्थ) Ch(1) Practice Quiz in Hindi Part – 1 || Class 9 Science Practice Quizzes in English Posted on February 28, 2025February 28, 2025 by Anshul Gupta0% 0 votes, 0 avg 5 Matter in Our Surroundings (हमारे आस पास के पदार्थ) Ch(1)Practice Quiz in Hindi Part – 1 || Class 9 Science Practice Quizzes in English 1 / 201. The intermixing of particles of two different types of matter on their own is called: A. Sublimation B. Condensation C. Evaporation D. Diffusion Explanation: Diffusion is the intermixing of particles of two different types of matter on their own.2 / 202. Why does a desert cooler cool better on a hot dry day? A. The air is hot and can hold less water vapor B. The air is dry and can hold less water vapor C. The air is dry and can hold more water vapor D. The air is already saturated with water vapor Explanation: A desert cooler works by evaporating water, which absorbs heat from the air. On a hot dry day, the air is dry and can hold more water vapor, so the rate of evaporation is higher, resulting in better cooling.3 / 203. Which of the following is an example of sublimation? A. Dew forming on grass B. Camphor disappearing into air C. Water boiling into steam D. Ice melting into water Explanation: Camphor undergoes sublimation, changing directly from solid to gas without changing into the liquid state.4 / 204. What is the boiling point of water in Kelvin scale? A. 0 K B. 373 K C. 273 K D. 100 K Explanation: The boiling point of water is 100°C, which is equal to 373 K.5 / 205. What happens to the particles of a solid when it melts into a liquid? A. They stop moving B. They move farther apart C. They become smaller D. They get closer together Explanation: When a solid melts, the particles gain kinetic energy and move farther apart, changing into the liquid state.6 / 206. Why do we see water droplets on the outer surface of a glass containing ice-cold water? A. The water inside the glass is sweating B. The water vapor in the air condenses on the cold surface C. The water vapor in the air evaporates from the cold surface D. The water inside the glass is leaking Explanation: The water vapor present in the air, on coming in contact with the cold glass of water, loses energy and gets converted to liquid state, which we see as water droplets.7 / 207. Which of the following is NOT matter? A. Sunlight B. Air C. Stone D. Water Explanation: Sunlight is a form of energy, not matter. Matter is anything that occupies space and has mass.8 / 208. What type of clothes should we wear in summer? A. Leather clothes B. Silk clothes C. Cotton clothes D. Woollen clothes Explanation: Cotton, being a good absorber of water, helps in absorbing sweat and exposing it to the atmosphere for easy evaporation, which keeps us cool in summer.9 / 209. What happens to the particles of matter when it is heated? A. They attract each other more strongly B. They stop moving C. Their kinetic energy increases D. They slow down Explanation: When matter is heated, the particles gain kinetic energy and start vibrating with greater speed.10 / 2010. Which of the following factors does NOT affect the rate of evaporation? A. Humidity B. Surface area C. Pressure D. Temperature Explanation: The rate of evaporation is affected by temperature, surface area, humidity, and wind speed, but not pressure.11 / 2011. What is the SI unit of mass? A. Gram B. Newton C. Pound D. Kilogram Explanation: The SI unit of mass is kilogram (kg).12 / 2012. What is the process of changing a liquid into a gas called? A. Condensation B. Deposition C. Vaporization D. Sublimation Explanation: Vaporization is the process of changing a liquid into a gas.13 / 2013. Which state of matter has a definite shape and volume? A. Liquid B. Solid C. Gas D. None of the above Explanation: Solids have a definite shape, distinct boundaries, and fixed volumes.14 / 2014. Which of the following is NOT a factor affecting evaporation? A. Temperature B. Pressure C. Humidity D. Surface area Explanation: The rate of evaporation is affected by temperature, surface area, humidity, and wind speed, but not pressure.15 / 2015. Why does our palm feel cold when we put some petrol or perfume on it? A. Petrol and perfume are cold liquids B. Petrol and perfume react with our skin C. Petrol and perfume absorb heat from our palm D. Petrol and perfume release heat into our palm Explanation: Petrol and perfume evaporate quickly, absorbing heat energy from our palm and causing it to feel cold.16 / 2016. Which state of matter has the highest kinetic energy? A. All have the same kinetic energy B. Solid C. Gas D. Liquid Explanation: Gas particles have the highest kinetic energy because they move about randomly at high speeds.17 / 2017. The process of a gas changing directly into a solid is called: A. Sublimation B. Condensation C. Deposition D. Evaporation Explanation: Deposition is the direct change of gas to solid without changing into the liquid state.18 / 2018. Which of the following is NOT a characteristic of particles of matter? A. They have space between them B. They are always at rest C. They are continuously moving D. They attract each other Explanation: Particles of matter are always moving and are never at rest.19 / 2019. What is the SI unit of volume? A. Cubic litre B. litre C. Cubi cmeter D. Millilitres Explanation: The SI unit of volume is cubic meter (m³).20 / 2020. Why does our palm feel cold when we put some acetone on it? A. Acetone is a cold liquid B. Acetone absorbs heat from our palm C. Acetone releases heat into our palm D. Acetone reacts with our skin Explanation: Acetone evaporates quickly, absorbing heat energy from our palm and causing it to feel cold.Please insert your information to see your ranking अपनी Ranking जानने के लिए कृपया अपनी जानकारी भरे NamePhone Number Your score isThe average score is 51% 0% Restart quiz Category: Class 9 Science Quizzes in English
