MCQ Class 9 Science Exploration Chapter 5 Exploring Mixtures and their Separation Advertisement 1. Chromatography means Writing with light Writing with colour Writing with heat Writing with gasQuestion 1 of 202. Immiscible liquids Mix completely Form layers Dissolve partially Form gasQuestion 2 of 203. Separating funnel is used for Soluble solids Immiscible liquids Gases ColloidsQuestion 3 of 204. The upper layer in oil-water mixture is Water Oil Both mix NoneQuestion 4 of 205. Sublimation is Solid to liquid Liquid to gas Solid to gas Gas to liquidQuestion 5 of 206. Deposition is Liquid to solid Gas to solid Solid to liquid Gas to liquidQuestion 6 of 207. Camphor separates from sand by Filtration Distillation Sublimation EvaporationQuestion 7 of 208. Suspension particles are Invisible Very small Large and visible DissolvedQuestion 8 of 209. Suspension particles Never settle Settle on standing Evaporate DissolveQuestion 9 of 2010. Centrifugation works on Heating Spinning force Cooling EvaporationQuestion 10 of 2011. Heavier particles in centrifugation Move inward Move outward Evaporate DissolveQuestion 11 of 2012. Coagulation involves Heating Cooling Clumping of particles DissolvingQuestion 12 of 2013. Alum acts as Solvent Solute Coagulant CatalystQuestion 13 of 2014. Colloids have particle size Less than 1 nm 1–1000 nm More than 1000 nm ZeroQuestion 14 of 2015. Colloid particles Settle Do not settle Dissolve fully EvaporateQuestion 15 of 2016. Blood is an example of Solution Suspension Colloid CompoundQuestion 16 of 2017. Tyndall effect is Reflection of light Refraction of light Scattering of light Absorption of lightQuestion 17 of 2018. Tyndall effect is seen in Solutions Colloids Pure water Air onlyQuestion 18 of 2019. Solutions do not show Tyndall effect because Particles are large Particles are small No particles Too denseQuestion 19 of 2020. Milk is an example of Solution Suspension Colloid CompoundQuestion 20 of 20 Loading...
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