Advertisements
Advertisements
प्रश्न
State whether colloidal solutions are homogeneous or heterogeneous.
Advertisements
उत्तर
Colloids are heterogeneous mixtures. The size of the particles in the colloids is bigger than the size of particles in the true solutions.
APPEARS IN
संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............
The inter-molecular force is maximum in
Name the terms for the change of a solid into liquid.
What are the characteristics of matter?
Bromine and air take about 15 minutes to diffuse completely but bromine diffuses into a vacuum very rapidly. Why is this so?
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
Name the property which enables metals to be drawn into wires.
What are the two types of pure substances? Give one example of each type.
Name a metal which has a low melting point.
Define Sol and give one example.
Which one of the following is not a chemical change ?
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
Atoms or groups of atoms having a charge are called ______.
Solids do not flow.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
Gases do not diffuse very easily.
Examples of foam are ______.
Define the term matter.
