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Explain why BF6^(3-) has no existence....

Explain why `BF_6^(3-)` has no existence.

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This is because boron cannot extend its valency to six due to absence of vacant d -orbitals.
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CHHAYA PUBLICATION-SOME p-BLOCK ELEMENTS-QUESTION-ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE)
  1. Which compound is responsible for the green - edged flame in a test fo...

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  2. Name the compound which on warming produces pure BF3.

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  3. Explain why BF6^(3-) has no existence.

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  4. What type of cations are identified by borax bead test ?

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  5. What happens when borax solution is acidified ?

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  6. How are the BO3^(3-) units in boric acid linked to give layered struct...

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  7. What is the shape of BO3^(3-) ion?

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  8. Which compounds are formed on heating boric acid ?

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  9. Using balanced chemical equat io n show how B(OH)3 behaves as a monoba...

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  10. What are the forces involved between the layers of two-dimensional she...

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  11. What is the composition of the transparent glassy bead obtained on hea...

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  12. What is the structural unit present in all allotropic forms of boron ?

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  13. What type of bonds are present in B2H6 molecule ?

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  14. Explain why boron connot form B^(3+) ions.

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  15. Mention the states of hybridisation of boron in B2H6 and in BF3.

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  16. Crystalline boron is an extremely hard solid - why ?

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  17. What are boranes ?

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  18. Boron shows anomalous behaviour and differs from the rest the members...

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  19. Which two out of five members of carbon family are distinctly metals ?

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  20. Which one out of catechol, resorcinol and quinol can be used to titrat...

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