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Growth of a plant isa) Physical changeb) Chemical changec) Chemical Reactiond) None of thesec) A colloid is a -a) Homogeneous mixtureb) Heterogeneous mixtyc) Solutiond) Suspensiond) Boling point of water is.a) 25°Cb) 30°Cc) 100°Cd)0°Ce) The forces of attraction between the solid particles are:-a) Mediumb) Highc) Lowd) None of theseद फोर्स आफ अट्रैक्शन बिटवीन द सॉलि़ड पार्टिकल्स |
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Answer» (a) The term saturated solution is used in chemistry to DEFINE a solution in which no more SOLVENT can be dissolved. It is understood that saturation of the solution has been achieved when any additional substance that is added results in a solid precipitate or is let off as a gas.
Eg: Saltwater (b) Pure substance: A material that is composed of only one type of particle. Eg: Gold, oxygen and water. (c) Colloid: A homogeneous non-crystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Eg: Gels, sols and emulsions. d) Suspension: A suspension is a heterogeneous mixture in which solute-like particles settle out of a solvent-like phase sometime after their introduction. We apply the word suspension when particles are big enough to eventually settle. Eg: wheat flour and water. |
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