Advertisements
Advertisements
प्रश्न
Explain what happens when a beam of light is passed through a colloidal solution.
Advertisements
उत्तर
Colloidal solution is a heterogeneous mixture in which particle size is intermediate of true solution and suspension, i.e., between 1 nm to 100 nm.
When a beam of light is passed through a colloidal solution, the particles of the solution get illuminated and become visible. This is because colloidal particles scatter the light falling on them.
APPEARS IN
संबंधित प्रश्न
A kind of matter which can sublime is
Name the property which enables metals to be drawn into wires.
Which of the following is not an element ?
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
How will you test whether a given solution is a colloidal solution ?
Which of the following will show Tyndall effect ? Why ?
- Salt solution
- Starch solution
- Milk
- Copper sulphate solution
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
How will you separate a mixture of common salt, sulphur powder and sand ?
Pure copper sulphate can be obtained from an impure sample by the process of :
Write a few lines on the blackboard with a chalk. Now observe the chalk. What changes do you see in the chalk?
______ is not made of matter.
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
Diffentiate between absorption and adsorption.
The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity:
| (A) | (B) | ||
| (a) | degree celsius | (i) | kilogram |
| (b) | centimetre | (ii) | pascal |
| (c) | gram per centimetre cube | (iii) | metre |
| (d) | bar | (iv) | kelvin |
| (e) | milligram | (v) | kilogram per metre cube |
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
The physical state of water at 373 K is ______.
Compressibility of solids: ______.
Gas-solid is ______.
Give an example of a molecule.
Define the term matter.
