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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
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b. 30 hexagons
c. 40 hexagons
d. 50 hexagons
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