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20.Option(d)
explaintion :adding milk in water because in this there is no specific composition.
21.Option(b)
22.Option(a)
23.Option(a)
explaintion:the liquid, gaseous, or solid phase in a two-phase system in which the particles of the dispersed phase are distributed. — called also continuous phase, external phase.
24.Option(a)
explaintion:A mixture of sulphur a and carbon disulphide is a heterogeneous colloid and shows Tyndall effect.
25.Option(b)
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1.Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
2.Dispersed phase of milk is liquid , dispersion medium is liquid and dispersed phase of fog is liquid , dispersion medium is gas.
3.'Tyndall effect' can be observed when sunlight passes through the canopy of a dense forest. In the forest, mist contains tiny droplets of water which act as particles of colloid dispersed in air.
4.The dissolved chalk will settle down after a few minutes , thus proving that the mixture is unstable. the chalk particles are clearly visible by naked eye . so the above mixture is a suspension . it has all the qualities of a suspension.
5.substance enclosed under pressure and released as a fine spray by means of a propellant gas.
6.A sol is a type of colloid in which solid is the dispersed phase and liquid is the dispersion medium. ... A gel is a type of colloid in liquid is the dispersed phase and solid is the dispersed medium. Examples include jelly, cheese etc.
7.In emulsions,dispersed phase is that liquid which is less in amount and dispersion medium is the one which in large amount. As an example, oil and water can form, first, an oil-in-water emulsion, wherein the oil is the dispersed phase, and water is the dispersion medium
8.the mixture of chalk and water, muddy water, the mixture of flour and water, a mixture of dust particles and air, fog, milk of magnesia.
9.Colloidal solution
10.A solution is a mixture of to states of matter. example of gas in liquid is the ocean, river etc because oxygen is mixed in it that's why fishes are still there. example of gas in gas is oxygen mixed with nitrogen, carbon dioxide etc..
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.International Union of Pure and Applied Chemistry. ... IUPAC's Inter-divisional Committee on Nomenclature and Symbols (IUPAC nomenclature) is the recognized world authority in developing standards for the naming of the chemical elements and compounds.