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Yogita Ingle 7 years, 6 months ago
Metals: Metals are lustrous, sonorous, ductile, and are good conductor of heat and electricity. Most of the non-metals are available as solid at room temperature; except mercury. Sodium and potassium are so soft that they can be cut with knife.
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Yogita Ingle 7 years, 6 months ago
A voltaic cell is a device which converts chemical energy to electric energy. The chemical reactions that takes place inside the cell cause the flow of electrons and hence, electricity is produced. A simple voltaic cell is made by placing two different metals in contact with and electrolyte. The metals act as the electrolyte for the voltaic cell.
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Yogita Ingle 7 years, 6 months ago
Mitochondria are the powerhouse of the cell because they supply power (energy) to all the cell of the body. All living cells have mitochondria (cell organelle), are responsible for producing energy (called ATP) that the cell needs to function. They are like power stations in our bodies, supplying energy to all cells for proper functioning.
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The substance which is used in white washing is calcium oxide or quick lime and its formula is CaO.
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Yogita Ingle 7 years, 6 months ago
Uses of coal gas:
- It is mainly used as a fuel in industries situated near coal processing plants.
- Earlier, it was used as a source of light. In the year 1820, it was used in London for the first time as street lighting.
- Now, it is more commonly used to provide heat for domestic and industrial purposes.
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