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 1 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. Which state of matter has the highest kinetic energy? A. Liquid B. Solid C. Gas D. All have the same kinetic energy Explanation: Gas particles have the highest kinetic energy because they move about randomly at high speeds.2 / 202. What happens to the particles of matter when it is heated? A. They slow down B. They stop moving C. They attract each other more strongly D. Their kinetic energy increases Explanation: When matter is heated, the particles gain kinetic energy and start vibrating with greater speed.3 / 203. Which of the following is NOT matter? A. Water B. Stone C. Sunlight D. Air Explanation: Sunlight is a form of energy, not matter. Matter is anything that occupies space and has mass.4 / 204. 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 already saturated with water vapor D. The air is dry and can hold more 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.5 / 205. Which of the following factors does NOT affect the rate of evaporation? A. Surface area B. Humidity C. Pressure D. Temperature Explanation: The rate of evaporation is affected by temperature, surface area, humidity, and wind speed, but not pressure.6 / 206. Which state of matter has a definite shape and volume? A. Gas B. None of the above C. Solid D. Liquid Explanation: Solids have a definite shape, distinct boundaries, and fixed volumes.7 / 207. What is the SI unit of mass? A. Newton B. Kilogram C. Pound D. Gram Explanation: The SI unit of mass is kilogram (kg).8 / 208. Which of the following is NOT a characteristic of particles of matter? A. They attract each other B. They have space between them C. They are continuously moving D. They are always at rest Explanation: Particles of matter are always moving and are never at rest.9 / 209. Why does our palm feel cold when we put some acetone on it? A. Acetone releases heat into our palm B. Acetone reacts with our skin C. Acetone absorbs heat from our palm D. Acetone is a cold liquid Explanation: Acetone evaporates quickly, absorbing heat energy from our palm and causing it to feel cold.10 / 2010. Why does our palm feel cold when we put some petrol or perfume on it? A. Petrol and perfume react with our skin B. Petrol and perfume are cold liquids C. Petrol and perfume release heat into our palm D. Petrol and perfume absorb heat from our palm Explanation: Petrol and perfume evaporate quickly, absorbing heat energy from our palm and causing it to feel cold.11 / 2011. What is the SI unit of volume? A. Millilitres B. litre C. Cubi cmeter D. Cubic litre Explanation: The SI unit of volume is cubic meter (m³).12 / 2012. The process of a gas changing directly into a solid is called: A. Condensation B. Evaporation C. Deposition D. Sublimation Explanation: Deposition is the direct change of gas to solid without changing into the liquid state.13 / 2013. The intermixing of particles of two different types of matter on their own is called: A. Diffusion B. Condensation C. Evaporation D. Sublimation Explanation: Diffusion is the intermixing of particles of two different types of matter on their own.14 / 2014. Which of the following is an example of sublimation? A. Camphor disappearing into air B. Water boiling into steam C. Dew forming on grass D. Ice melting into water Explanation: Camphor undergoes sublimation, changing directly from solid to gas without changing into the liquid state.15 / 2015. What type of clothes should we wear in summer? A. Leather clothes B. Silk clothes C. Woollen clothes D. Cotton 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.16 / 2016. What happens to the particles of a solid when it melts into a liquid? A. They stop moving B. They become smaller C. They get closer together D. They move farther apart Explanation: When a solid melts, the particles gain kinetic energy and move farther apart, changing into the liquid state.17 / 2017. What is the process of changing a liquid into a gas called? A. Sublimation B. Vaporization C. Deposition D. Condensation Explanation: Vaporization is the process of changing a liquid into a gas.18 / 2018. Which of the following is NOT a factor affecting evaporation? A. Pressure B. Temperature C. Humidity D. Surface area Explanation: The rate of evaporation is affected by temperature, surface area, humidity, and wind speed, but not pressure.19 / 2019. What is the boiling point of water in Kelvin scale? A. 373 K B. 0 K C. 273 K D. 100 K Explanation: The boiling point of water is 100°C, which is equal to 373 K.20 / 2020. Why do we see water droplets on the outer surface of a glass containing ice-cold water? A. The water inside the glass is leaking B. The water inside the glass is sweating C. The water vapor in the air evaporates from the cold surface D. The water vapor in the air condenses on the cold surface 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.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 80% 0% Restart quiz Category: Class 9 Science Quizzes in English
