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प्रश्न
Define the emulsion. Give one example.
Define emulsion and give an example.
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उत्तर
An emulsion is a colloid in which minute droplets of one liquid are dispersed in another liquid which is not miscible with it. Examples are milk and butter.
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संबंधित प्रश्न
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
Define matter. Give four examples of matter.
Which of the following is a mixture ?
Salt, Air, Water, Alum, Sugar
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
What elements do the following compounds contain ?
Sugar, Common salt
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
How will you differentiate between a suspension and a colloid ?
How would you prepare a saturated solution of sodium chloride in water at 25°C ? What will happen if this solution is cooled to 10°C ?
One of the following liquids will leave behind a residue on heating. This one is :
What is chromatography ? State its two applications.
If there is a sudden shower, we take shelter under a roof at the roadside. Even though the rain does not fall on us directly, we get wet to some extent. Why ?
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
The most reactive metal is ______.
Atoms or groups of atoms having a charge are called ______.
Evaporation does form bubbles.
Define the term matter.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
