Advertisements
Advertisements
प्रश्न
State two characteristics of matter demonstrated by Brownian motion.
Advertisements
उत्तर
The characteristics of matter demonstrated by Brownian motion are :
- The matter is made up of tiny particles.
- Particles move randomly and collide with one another.
APPEARS IN
संबंधित प्रश्न
Define the term matter. What is it composed of?
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 ...................
Explain why steel is used to make railway lines.
State two physical properties on the basis of which metals can be distinguished from non-metals.
Which of the following is not an element ?
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
Define Aerosol Give one example.
What type of magnet is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?
Name the process you would use to separate a mixture of water and alcohol.
How will you separate a mixture of common salt, sulphur powder and sand ?
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
The property which allows the metals to be hammered into their sheets is ______.
______ is so hard that it can scratch glass.
A teabag placed in a cup of hot water will diffuse into the water.
The phenomenon of Evaporation takes place at the ______ of a liquid.
Examples of foam are ______.
Define the term matter.
