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Boric acid B(OH)(3) is weak monobasic ac...

Boric acid `B(OH)_(3)` is weak monobasic acid reacts with alkali to form borates. The most common borate of boric acid is borax represented as `Na_(2)(B_(4)O_(5)(OH)_(4)).8H_(2)O` which is made up of two tetrahedral and two triangular units. On dissolution in water, these tetrahedral and triangular units are sepeated. Borax is useful primary standard for titra tion against acids.
Oxidation state of boron atom in borax is / are

A

`+3` only

B

three atoms + 3 and one atom + 2

C

`+2` only

D

two atoms + 3 and two atoms + 4

Text Solution

Verified by Experts

The correct Answer is:
A
`Na_(2)B_(4)O_(7) rArr 2+4x-14=0, 4x=12 rArr x=+3`
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Boric acid B(OH)_(3) is weak monobasic acid reacts with alkali to form borates. The most common borate of boric acid is borax represented as Na_(2)(B_(4)O_(5)(OH)_(4)).8H_(2)O which is made up of two tetrahedral and two triangular units. On dissolution in water, these tetrahedral and triangular units are sepeated. Borax is useful primary standard for titra tion against acids. The number of B - O - B linkage in borax is / are The number of B - O - B linkages =

Boric acid B(OH)_(3) is weak monobasic acid reacts with alkali to form borates. The most common borate of boric acid is borax represented as Na_(2)(B_(4)O_5(OH)_4.8H_2O which is made up of two tetrahedral and two triangular units. On dissolution in water, these tetrahedral and triangular units are seperated. Borax is useful primary standard for titra tion against acids The number of B - O - B linkage in borax is/are

Boric acid (H_3 BO_3) has

Boric acid (H_(2)BO_(3)) has

Boric acid (H_(3)BO_(3)) has

Boric acid (H_(3)BO_(3)) has

The hybridisation of boron in borax is

The anhydride of boric acid is

Write the important uses of borax and boric acid.

AAKASH SERIES-ELEMENTS OF BORON FAMILY-LECTURE SHEET (EXERCISE - I) LEVEL - II (ADVANCED)
  1. Which of the following does not exist ?

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  2. The following has a potential to be used as a rocket fuel

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  3. Stability of monovalent and trivalent cations of Ga, In, Tl lie in the...

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  4. When metal carbides react with H(2)O, the correct equations are

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  5. Which of the following statements are true for H(3)BO(3) ?

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  6. Which of the following statements(s) is/are correct regarding the stru...

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  7. Al and Ga have nearly the same covalent radius, incorrect reason is

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  8. Borazine is called 'inorganic benzene' in view of its ring structure w...

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  9. ln which of the following molecules, vacant orbitals cake part in hybr...

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  10. Orthoboric acid (H(3)BO(3)) and metaboric acid (HBO(2)) differ in resp...

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  11. BF(3) is

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  12. On the basis of reaction sequence given above, answer the following. ...

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  13. On the basis of reaction sequence given above, answer the following. ...

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  14. On the basis of reaction sequence given above, answer the following. ...

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  15. Boric acid B(OH)(3) is weak monobasic acid reacts with alkali to form ...

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  16. Boric acid B(OH)(3) is weak monobasic acid reacts with alkali to form ...

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  17. How many of the following are non - metals B, Al, Ga, In, Tl, C, Si, G...

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  18. underset(("Swollen white mass"))(Na(2)B(4)O(7).XH(2)O)overset(60^(@)C)...

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  19. How many moles of hydrochloric acid react with one mole of borax to co...

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  20. In the borax compound, if the (a) Number of B - O - B bonds is 'x' , (...

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