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प्रश्न
Write the differences between elements and compounds and give an example for each.
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उत्तर
| S.No. | Elements | Compounds |
| 1. | Contains only one kind of atom. | Contains more than one kind of atom. |
| 2. | It is a pure substance. | It is not a pure substance. |
| 3. | Elements cannot be broken down further into simpler substances by chemical methods. | Compounds can be broken down further into simpler substances by chemical methods. |
| 4. | Elements have definite physical and chemical properties. | Compounds have definite physical and chemical properties. |
| 5. | Examples of elements: oxygen O2, hydrogen H2, sodium Na. | Examples of compounds are water H2O, cane sugar C12H22O11. |
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संबंधित प्रश्न
Name the main metal present in the following:
Chlorophyll
Give four examples of non-metallic elements.
Define:- Filtration
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Sedimentation and decantation
Give one word answer
The process of transferring the clean liquid after the solid settles at the bottom of the container
Write true or false
All pure substances have characteristic melting and boiling points.
Match the columns.
| Column A | Column B |
| 1. To separate grain from chaff | a. filtration |
| 2. To seperat sawdust from water | b. sedimentation and decantation |
| 3. To separate iodine from sodium chloried | c. winnowing |
| 4. To separate iron fillings from sand | d. sublimation |
| 5.It is used to separate sand and water | e.magnetic separation |
| f. handpiicking |
Differentiate between the terms elements, compounds, and mixtures with suitable examples.
Water is a ______.
When two or more elements combine together they form ______.
