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प्रश्न
Fill in the blank
All matter is made up of tiny particles called ______
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उत्तर
All matter is made up of tiny particles called atoms.
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संबंधित प्रश्न
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
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
Explain why steel is used to make railway lines.
What are the characteristics of matter?
The best evidence for the existence and movement of particles in liquids was provided by :
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
What elements do the following compounds contain ?
Sugar, Common salt
State any two properties for believing that aluminium is a metal.
Name a metal which has a low melting point.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
Define Aerosol Give one example.
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
Naphthalene can be separated from sand :
If there is a sudden shower, we take shelter under a roof at the roadside. Even though the rain does not fall on us directly, we get wet to some extent. Why ?
The fluidity of solids: ______.
Define the term matter.
