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What is the formula of borax ?...

What is the formula of borax ?

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`Na_(2)B_(4)O_(7).10H_(2)O` or boric acid / diborane .
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SUBHASH PUBLICATION-P-BLOCK ELEMENTS-Three mark questions and answers
  1. What is the formula of borax ?

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  2. What is allotropy ? Mention about the allotropic forms of Pb, Ge , Si.

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  3. Write the anomalous behaviours of boron.

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  4. What happens when group 14 elements react with oxygen and water ?

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  5. How does silicon dioxide react with NaOH and HF ?

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  6. Discuss the basic unit and structure of silicates.

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. Mention three important uses of borax.

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  21. What is allotropy ? Give examples of allotropes.

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