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प्रश्न
State how carbon occurs in the free state and in the combined state.
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उत्तर
- Occurence of carbon : In free state – diamond, graphite, in impure form as coal.
- In combind state : CO2 in atmosphere, hydro-carbon as natural gas, petroleum, cellulose in wood and limestone CaCO3.
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संबंधित प्रश्न
Name the element whose allotropic form is graphite.
Define the following:
Adsorption
Name the products formed when:
wood is burnt in the absence of air.
Write the balanced chemical equations for the preparation of carbon dioxide by:
the action of acetic acid on sodium bicarbonate.
What steps should be taken to balance carbon dioxide in the atmosphere ?
FILL IN THE BLANK
Carbon atom has ................... electrons in its valence shell.
Explain the ways in which glucose is broken down in absence or shortage of oxygen.
Draw the structures for ethanoic acid.
State in brief the transformation of vegetable matter to different types of coal varying in carbon content.
Carbon dioxide occurs both in the free state and in the combined state.
State three methods how carbon dioxide is added to the atmosphere.
