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प्रश्न
What are the characteristics of matter?
उत्तर
The characteristics of matter are:
(i) Matter is made up of tiny particles.
(ii) The particles of matter attract each other.
(iii) The particles of matter have spaces between them.
(iv) The particles of matter are constantly moving.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Liquids have definite volume but do not have definite shape.
Give one difference between atoms and molecules.
Define the following term of Atom .
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 ...................
Describe in your own words, what happens to the particles when salt dissolves in water.
A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO4 to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
Define solute.
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
How is scrap iron separated from a heap of waste materials in factories?
How is the impurity of iron present in several substances removed in industries ?
Write a few lines on the blackboard with a chalk. Now observe the chalk. What changes do you see in the chalk?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
Gas-solid is ______.
Define the term matter.
Define the term matter.
