Advertisements
Advertisements
प्रश्न
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
Advertisements
उत्तर
The particles of potassium permanganate and water mix on their own without any stirring. Two conclusions can be drawn from this phenomenon. These are:
- Potassium permanganate and water are made up of very tiny particles.
- Water particles have large spaces between them which are occupied by the tiny potassium permanganate particles.
APPEARS IN
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 |
Name the terms for the change of vapour into a liquid.
A kind of matter which can sublime is
Describe in your own words, what happens to the particles when salt dissolves in water.
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
Which of the following are compounds ?
- CO
- No
- NO
- Co
On the basis of composition of matter, milk is considered to be :
State whether the following statement is true or false :
Bread is an example of solid foam.
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
Name the source from which nitrogen and oxygen are obtained on a large scale.
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
How will you separate a mixture of iron filings, chalk powder and common salt ?
Select the correct answer from A, B, C, D & E for the statement given below:
An atom or group of atoms _________ having a resultant charge.
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
The property which allows the metals to be hammered into their sheets is ______.
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
The fluidity of solids: ______.
Define the term matter.
Define the term matter.
