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
Liquids have definite shape and definite volume.
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
What is the other name for impure substances ? Give two examples of impure substances.
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
Draw a flow-chart for the schematic representation of different types of matter.
State whether colloidal solutions are homogeneous or heterogeneous.
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Name the process by which common salt is purified.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
The property which allows the metals to be hammered into their sheets is ______.
What type of matter glass is?
Solid is an arrangement of particles ______.
The fluidity of solids: ______.
Gas-solid is ______.
Examples of foam are ______.
