Question
On which basis, materials can be divided?
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Answer
Materials can be divided as metals and non$-$metals. Metals can be separated on the basis of physical and chemical properties.
Physical properties:
Ductility, Malleability, Lustre and Hardness are physical properties.
Chemical properties:
$i.$ Metals on reaction with oxygen form basic oxides while non$-$metals on reaction with oxygen form acidic oxides.
$ii.$ Metals react with water but non$-$metals do not react with water.
$iii.$ Metals react with acids and produce hydrogen gas but non$-$metals do not react with acids.
$iv.$ Metals react with bases and produce hydrogen gas but reactions of non$-$metals with bases are complex.
Physical properties:
Ductility, Malleability, Lustre and Hardness are physical properties.
Chemical properties:
$i.$ Metals on reaction with oxygen form basic oxides while non$-$metals on reaction with oxygen form acidic oxides.
$ii.$ Metals react with water but non$-$metals do not react with water.
$iii.$ Metals react with acids and produce hydrogen gas but non$-$metals do not react with acids.
$iv.$ Metals react with bases and produce hydrogen gas but reactions of non$-$metals with bases are complex.
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