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प्रश्न
On the basis of composition of matter, milk is considered to be :
पर्याय
a pure substance
an impure substance
an element
a compound
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उत्तर
an impure substance
Milk is considered to be an impure substance as it is an emulsion. Emulsion is a colloid in which minute droplets of one liquid are dispersed in another liquid, which is not miscible with it.
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संबंधित प्रश्न
Name the terms for the particles of matter which may or may not have independent existence.
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
In what respects does a true solution differ from a colloidal solution ?
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
Which of the following represents the solubility of sugar in water at 20°C ?
One of the following liquids will leave behind a residue on heating. This one is :
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
Diffentiate between absorption and adsorption.
Liquids have ______.
Intermolecular space is maximum in ______.
Which statement is not correct for a mixture
Gases change to liquid by the process of ______.
A teabag placed in a cup of hot water will diffuse into the water.
Solids do not flow.
The phenomenon of Evaporation takes place at the ______ of a liquid.
