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प्रश्न
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
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उत्तर
All the elements can be divided into following three groups:
- Metals: Examples: Aluminium and copper
- Non-metals: Examples: Potassium and calcium
- Metalloids: Examples: Arsenic and antimony
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संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
The inter-molecular force is maximum in
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
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 ...................
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
Draw a flow-chart for the schematic representation of different types of matter.
Choose the correct answer.
A 5 per cent sugar solution means that :
Define solvent.
Define Aerosol Give one example.
What is meant by the concentration of a solution ?
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.
Name the process which can be used to recover salt from an aqueous salt solution.
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
Explain how, impure copper sulphate can be purified by crystallisation.
One of the following does not undergo sublimation. This one is :
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
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The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
The phenomenon of Evaporation takes place at the ______ of a liquid.
Gas-solid is ______.
Define the term matter.
