Advertisements
Advertisements
प्रश्न
Define Sol and give one example.
Advertisements
उत्तर
Sol – Sol is a colloid in which tiny solid particles are dispersed in a liquid medium. Examples are ink and soap solution.
APPEARS IN
संबंधित प्रश्न
The inter-molecular force is maximum in
Fill in the blank :
The substances which can flow are called ________
Explain why steel is used to make railway lines.
Which one of the following is not a metalloid ?
What happens when the temperature of a saturated sugar solution is increased ?
Define solvent.
In what respects does a true solution differ from a colloidal solution ?
What is meant by the concentration of a solution ?
What is the effect of temperature on the solubility of solids in liquids ?
One of the following is a solid foam. This one is :
One of the following represents the solution of solid in a solid. This one is :
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.
Which of the following cannot be separated from air by the process of fractional distillation ?
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Diffentiate between absorption and adsorption.
Atoms or groups of atoms having a charge are called ______.
The phenomenon of Evaporation takes place at the ______ of a liquid.
