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प्रश्न
All kinds of matter
विकल्प
occupy space and have definite mass
have mass and definite shape
can change their states
have definite volume
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उत्तर
occupy space and have definite mass
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संबंधित प्रश्न
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
State two characteristics of matter demonstrated by Brownian motion.
Describe in your own words, what happens to the particles when salt dissolves in water.
Explain why air is used to inflate tyres.
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?
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 a non-metal which is a good conductor of electricity.
Fill in the following blanks with suitable words :
Brass is an alloy which is considered a ..............
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
The property/properties which enable copper metal to be used for making electric wires is/are :
Which of the following does not have a fixed melting point/boiling point ?
How will you test whether a given solution is a colloidal solution ?
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.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Write a few lines on the blackboard with a chalk. Now observe the chalk. What changes do you see in the chalk?
Give an example of a molecule.
Define the term matter.
