Substances have both chemical properties
andphysical properties.
A)Which of the following properties of aluminum are chemical
properties?
| In moist air it combines with oxygen to form aluminum oxide. |
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| It is a shiny, silvery white metal. | ||||||||
| It reacts with chlorine to form aluminum chloride | It has a mass of 26.98 g. | |||||||
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B)Which of the following properties of a piece of wood are physical properties?
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Answer
(A) : Physical properties of a substance represent physical
appearances like colour, hardness, mass, volume, physical state
etc.
Hence the following properties are physical properties.
1.It is a shiny, silvery white metal.
2.It has a mass of 26.98 g.
During a chemical reaction, new product(s) is/are formed
followed by change
in properties, temperature etc. Hence the following properties
are chemical properties as new products are formed.
1.In moist air it combines with oxygen to form aluminum
oxide.
2.It reacts with chlorine to form aluminum chloride
(B) : The physical properties of wood are
1.It has a mass of 2.3 g.
2.It is rough to touch.
3.It is hard.