Advertisements
Advertisements
Question
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
Solution
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
RELATED QUESTIONS
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 ...................
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
Draw a flow-chart for the schematic representation of different types of matter.
State whether colloidal solutions are homogeneous or heterogeneous.
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
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
What is the difference between colloids and suspensions ?
What is the general name of the process by which tea-leaves are separated from prepared tea ?
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
What is chromatography ? State its two applications.
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
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.
Wipe the board with a duster and then tap the duster against the table. What do you see?
In Aerosol the dispersed phase is liquid and the dispersion medium is gas.
Liquids have ______.
Intermolecular space is maximum in ______.
Define the term matter.
