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Carbon dioxide is a gas but silica is a ...

Carbon dioxide is a gas but silica is a solid because:

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DINESH PUBLICATION-P BLOCK ELEMENTS (GROUP 13 AND 14 )-Concept based
  1. Why PbX2 is more stable than PbX4?.

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  2. Carbon and silicon are mainly tetravalent while germanium, tin and lea...

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  3. Carbon dioxide is a gas but silica is a solid because:

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  4. Trisilicylamine is a weaker bse than trimethylamine. Explain.

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  5. Why is SiCl(4) readily hydrolysed but C Cl(4) is resistant to hydrolys...

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  6. Why trimethylamine is pyramidal but trisilylamine is planar ?

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  7. Write the balanced equation for the following ractions. (i) SnO is ...

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  8. On heating a borate with ethyl alcohol and cone. H(2)SO(4), a green ed...

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  9. What happens when (write chemical equations): (a) Orthoboric acid is...

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  10. Select the false statements from the following and try to justify your...

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  11. How would you explain the lower atomic radii of Ga as compared to Al?

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  12. Aluminium shows +3 oxidation staet in its compounds but in case of las...

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  13. AIF(3) is insoluble in anhydrous HF but when little KF is added to the...

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  14. Answer the following: (a) Why is BBr(3) a stronger Lewis acid as com...

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  15. BCl(3) is trigonal planr while AlCl(3) is tetrahedral in dimeric state...

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  16. Why is SIF(4) a stronger Lewis acid a s compared to SiCl(4)?

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  17. Hallides of boron and aluminium are Lewis Acids. Assign reason.

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  18. Anhydrous AlCl(3) is covalent but hydrated AlCl(3) is electrovalent. ...

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  19. Why no visible reaction occurs when aluminium is left in contact with ...

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  20. Aluminium metal is frequently used as a reducing agent for the extract...

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