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What is dry ice ? Why is it called so ? ...

What is dry ice ? Why is it called so ? How to prepare a pure sample of CO ( Carbon monoxide ) ?

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Solid `CO_(2)` is called dry ice. It is called dry ice because it directly changes into gaseous state without becoming liquid.
`"HCOOH" underset (373 K) overset ("Conc" H_(2)SO_(4)) (rarr) CO+H_(2) O.`
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SUBHASH PUBLICATION-P-BLOCK ELEMENTS-Three mark questions and answers
  1. Discuss the basic unit and structure of silicates.

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  2. How does metallic character vary among group 14 elements ? How is it r...

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  3. Write a note on the structure of Fullerene. Mention any two of its app...

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  4. Explain the structure of graphite giving the reason for its softness a...

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  5. Explain the structure of diamond giving the reason for its harness as ...

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  6. Give is the difference in the structure of the following pair of comou...

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  7. Explain the formation of (i) water gas (ii) producer gas. Give their u...

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  8. What happens when CO(2) is passed through lime water (i) for a short ...

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  9. What is dry ice ? Why is it called so ? How to prepare a pure sample o...

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  10. What happens when ? (i) Quick lime is heated with coke ? (ii) Carbon m...

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  11. Give a comparative account of the chemistry of carbon and silicon with...

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  12. A certain salt X gives the following results (i) Its aqueous solution ...

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  13. (a ) Carbon dioxide is non -polar while water is polar. What conclusio...

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  14. A white crystalline solid A dissolves in water to give an alkaline sol...

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  15. Mention three important uses of borax.

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  16. What is allotropy ? Give examples of allotropes.

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  17. Give three uses each of the different allotropic forms of carbon.

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  18. How is boron obtained from borax ? Give chemical equations with reacti...

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  19. What is inorganic benzene ? Why is it so called ? How will you get it ...

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  20. State with equations what happens when borax is heated on a plantium w...

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