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Arnab Banerjee 7 years, 9 months ago
1. burning of wax forming carbon dioxide. (chemical change)because new substances are formed (carbon dioxide).
2. melting of wax . (physical change) no new substances are formed and only the state changes.
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Yogita Ingle 7 years, 9 months ago
Uses of non-metal
1) Oxygen is a non-metal which is used by plants and animals for breathing. It is essential for maintaining our life. It is used in the process of burning of fuels in homes, factories and transport vehicles.
2)Nitrogen is used in making fertilisers to enhance plant growth. It is used in food packing instead of air, to keep the food healthy.
3) Chlorine is used in the water purification process. It has the ability to kill germs ,so chlorine makes the drinking water supply germ free.
4) Iodine is used to make purple coloured solution called tincture of iodine which is applied on cuts and wounds as an antiseptic.
5) Sulphur and phosphorus which are used in fireworks.
6) Sulphur is used in the vulcanisation of rubber.
7) Carbon is used as a fuel.
Posted by Priya Sute 7 years, 10 months ago
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Yogita Ingle 7 years, 9 months ago
Uses of non-metal
1) Oxygen is a non-metal which is used by plants and animals for breathing. It is essential for maintaining our life. It is used in the process of burning of fuels in homes, factories and transport vehicles.
2)Nitrogen is used in making fertilisers to enhance plant growth. It is used in food packing instead of air, to keep the food healthy.
3) Chlorine is used in the water purification process. It has the ability to kill germs ,so chlorine makes the drinking water supply germ free.
4) Iodine is used to make purple coloured solution called tincture of iodine which is applied on cuts and wounds as an antiseptic.
5) Sulphur and phosphorus which are used in fireworks.
6) Sulphur is used in the vulcanisation of rubber.
7) Carbon is used as a fuel.
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Arnab Banerjee 7 years, 9 months ago
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Arnab Banerjee 7 years, 9 months ago
1Thank You