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प्रश्न
State in brief the transformation of vegetable matter to different types of coal varying in carbon content.
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उत्तर
Transformation of vegetable matter to coal is due to slow bacterial decomposition of vegetable matter under the influence of heat from within the earth, high pressure of earth (soil) above it and in absence of oxygen over millions of year.
The different stages of transformation of vegetable matter results in different types of coal
- 60%C is peat
- 65%C is lignite
- 85%C is bituminous
- 90%C is anthracite
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संबंधित प्रश्न
Name the element whose allotropic form is graphite.
Match the colunm
| column A | column B |
| 1. A product of incomplete burning | a. Hopcolite |
| 2. Nature of carben monoxide | b. Combustible gas |
| 3. A compound formed by the combination of haemoglobin and carbon monoxide | c. carboxy-haemoglobin |
| 4. A mixture of metallic oxides | d. Carbon monoxide |
| 5. Carbon monoxide | e. Highly poisonous |
Why are carbon and its compounds used as fuels?
Give a balanced equation for the following conversion: [In one or two steps]
Calcium bicarbonate to calcium nitrate using a dilute acid.
Complete the statement by filling the blank with the correct word from the option.
Sodium oxide combines with carbon dioxide to give _____
Match the following.
| 1. | Alkyne | Bucky Ball |
| 2. | Andre Geim | Oxidation |
| 3. | C60 | Graphene |
| 4. | Thermocol | Triple bond |
| 5. | Combution | Polystyrene |
Carbon exists in the atmosphere in the form of ______.
Carbon monoxide displaces ______ from hemoglobin.
Which theory was challenged by the synthetic preparation of Urea?
How many valence electrons are there in carbon?
