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प्रश्न
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
Magnetic separation
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उत्तर
Magnetic separation : This method is used when one of the components of the mixture is iron. Iron gets attracted towards a magnet and hence can be separated. Mixtures of iron and sulphur, iron and sand, etc., can be separated by moving a magnet over them. Iron gets attached to the magnet and is separated.
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संबंधित प्रश्न
Fill in the blank:
Dalton used symbol _____ for oxygen and _____ for hydrogen.
Give two examples of the following:
Solid + Liquid mixture
An atom of an element is denoted by a “symbol” Explain the meaning of the term ‘symbol’. State a reason for representing the following element by its symbol.
Helium by ‘He’
For writing a chemical formula – ‘symbols’ and combining capacity of an element with hydrogen i.e. ‘valency’ should be known. Explain the term – combining the capacity of an element i.e. valency.
State the type of element for the following:
Chlorine
State the type of element for the following:
Lead
Give the symbol of the following element:
Phosphate
Write the radical of the following valency:
Calcium
Write the chemical formula of the following:
magnesium oxide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Bromide
