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प्रश्न
Define matter.
उत्तर
Anything that has mass and occupies space is called matter.
संबंधित प्रश्न
Differentiate between an atom and a molecule.
Classify the following into elements and compounds :
- H2O
- He
- Cl2
- CO
- Co
What elements do the following compounds contain ?
Sugar, Common salt
What are the three general classes of matter ? Give one example of each type.
There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.
- What could the group of materials P be ?
- Name the substances Q. Give two examples of such substances.
- Name the substances R. Write two examples of such substances.
- Name the substances S. Give two examples of such substances.
- Out of Q, R and S, which substances are malleable and ductile ?
How much water should be added to 15 grams of salt to obtain 15 per cent salt 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.
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
What is the difference between colloids and suspensions ?
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
How will you separate a mixture containing sand and sugar ?
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Explain the meaning of the term matter with special reference to the term ‘substance’.
Name the metals that are used in jewellery.
Stars including Sun are covered in ______.
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
The movement of particles in liquids is ______.
A teabag placed in a cup of hot water will diffuse into the water.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
Define the term matter.
