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प्रश्न
Differentiate between the terms –
elements, compounds & mixtures.
उत्तर
Element is a pure substance.
1. It is the basic unit of matter and cannot be broken down into two or simpler substances by any means.
2. It is mainly classified into metals, non-metals, metalloids, and noble gases.
The compound is a pure substance.
1. It is formed by a combination of two or more elements.
2. The elements are combined together in a fixed ratio.
3. It can be broken down into its elements by chemical means.
The mixture is an impure substance.
1. It is formed by the combination of two or more elements, compounds, or both.
2. The substances are mechanically mixed together in any ratio.
संबंधित प्रश्न
Name: a Metal Which is brittle
Classify the following substances into elements and compounds
Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.
Fill in the blank
A liquid non-metal is _______.
Write the names of elements from the following symbol:
Fe
Select the correct answer to the statement given below:
A metalloid
State why brass is considered as a homogenous mixture while a mixture of iron & sulphur – heterogenous.
Give an example of two liquids that form heterogeneous – mixtures.
Classify the following as elements and compounds.
Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is required for combustion.
Elements contain the ______of the same kind.
