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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
Choose the correct alternative.
Carbon forms innumerable compounds because
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 |
FILL IN THE BLANK
Carbon atom has ................... electrons in its valence shell.
FILL IN THE BLANK
Organic compounds have ........ boiling and melting points.
Give a balanced equation for the following conversion: [In one or two steps]
Carbon dioxide to carbon.
Complete the statement by filling the blank with the correct word from the option.
Sodium oxide combines with carbon dioxide to give _____
Give reason for the following:
Both CO2 & SO2 turn lime water milky. Moist potassium permanganate paper, helps in distinguishing the two gases.
Carbon exists in the atmosphere in the form of ______.
Elemental carbon undergoes ______ reaction at room temperature.
The carbon cycle is the ______ cycle.
