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Which compound is responsible for the gr...

Which compound is responsible for the green - edged flame in a test for borate ion ?

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Triethyl borate `[B(OC_2H_5)_3]`.
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CHHAYA PUBLICATION-SOME p-BLOCK ELEMENTS-QUESTION-ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE)
  1. Which of the Gr- 13 elements forms acidic oxide ?

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  2. Arrange the following compounds in order of decreasing strength as Lew...

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  3. Which compound is responsible for the green - edged flame in a test fo...

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

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

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

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  7. What happens when borax solution is acidified ?

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

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

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  10. Which compounds are formed on heating boric acid ?

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

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

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

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

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

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

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

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

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  19. What are boranes ?

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

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