Advertisements
Advertisements
Question
In what respects does a true solution differ from a colloidal solution ?
Advertisements
Solution
| Property | True Solution | Colloidal Solution |
| Size of the particles | < 1nm | 1 – 100 nm |
| Nature | Homogeneous | Heterogeneous |
| Tyndall effect | True Solution does not show Tyndall effect. | Colloidal solution shows Tyndall effect. |
| Separation | Cannot be done by filtration | Separation of colloidal solution cannot be done by filtration. However, it is possible by centrifugation process. |
APPEARS IN
RELATED QUESTIONS
Gases have definite volume but no definite shape.
All kinds of matter
What are the conditions for 'something' to be called 'matter'?
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
The three important metalloids are.............................. and ..........................
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
What is the effect of temperature on the solubility of solids in liquids ?
What is a suspension ? Give two examples of suspensions.
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.
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
Name the process you would use to separate a mixture of water and alcohol.
How is scrap iron separated from a heap of waste materials in factories?
How will you separate a mixture of iron filings, chalk powder and common salt ?
Explain how, impure copper sulphate can be purified by crystallisation.
The material which is added to water during purification process at the water works so as to disinfect it is :
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
The particles in the matter are extremely small and can be seen even with a powerful microscope.
In Aerosol the dispersed phase is liquid and the dispersion medium is gas.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
Gases do not diffuse very easily.
