The Non-Allotropic from of carbon.
The Non-Allotropic from of carbon.
Charcoal and soot are also forms of carbon but they do not occur naturally. They are made by heating animal bones, wood, nut shell,, blood or coal in a limited amount of air.
Coke is another from of carbon which is made by heating coal at about 1300C in the absence of air. Charcoal is used for absorbing dangerous gases. It is also used by the artists. Coke is used as a fuel and as a reducing agent in various chemical industries.
Organic Chemistry
Organic Chemistry is the chemistry of compounds which contain the element carbon. Most of these compounds also contain hydrogen and many also contain axygen or other element.
There are a few compounds which contain carbon but are not classified as organic compounds. carbon monoxide, carbon dioxide and the metal carbonates are examples.
Water
Water is the common compound on earth. For instance, about four fifth of the earth surface is covered with sea. It is the only chemical compound found naturally as a liquid, as a solid (ice) and as a gas (water vapours). Water plays a vital role in industry, in home and in laboratory and is also essential for life. About two thirds of the human body is water and many foods consist predominantly of water.
Air
The atmosphere surrounding our earth is a mixture of various gases. The percentage composition of air by volume is shown in table.
The composition of air remains approximately constant. For example, the compositions of oxygen and carbon dioxide is kept constant by the process of photosynthesis and respiration respectively.
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