CBSE Class 9 class9_matter_basics — practice questions
23 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 9 class9_matter_basics in the app →Avogadro's number equals:A compound differs from a mixture because:The intermixing of particles of matter on their own is called:On heating, the rate of diffusion becomes:Which state of matter diffuses fastest into another?The melting point of ice is:The change of a solid into a liquid is also known as:While ice is melting, the temperature of the system:Heat absorbed without a rise in temperature is called:The heat needed to melt 1 kg of a solid at its melting point is the:The temperature at which a liquid starts boiling is its:Boiling is described as which kind of phenomenon?The boiling point of water is:Steam holds more energy than water at the same temperature due to:A change directly from solid to gas is called:A change directly from gas to solid is called:The SI unit of temperature is the:To change Celsius into Kelvin you must:Change of a liquid into vapour below its boiling point is:Evaporation is described as which kind of phenomenon?Spreading clothes out to dry increases which factor?The amount of water vapour present in air is called:The rate of evaporation increases with a decrease in: