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What is not true about borax ?...

What is not true about borax ?

A

Molecular formula is `Na_(2)B_(4)O_(7). 10H_(2)O`.

B

Crystallic borax contains tetranuclear unit of `[B_(4)O_(5)(OH)_(4)]^(2-)`.

C

It hydrolyses to give an acidic solution.

D

White crystalline solid.

Text Solution

Verified by Experts

The correct Answer is:
C
`Na_(2)B_(4)O_(7) +7H_(2) O rarr underset(underset("base")("Strong"))(2NaOH) + underset(underset("acid")("Weak"))(4B(OH)_(3))`
On hydrolysis, an alkaline solution is formed.
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CENGAGE CHEMISTRY-P-BLOCK GROUP 13 - BORON FAMILY-Exercise (Single Correct)
  1. Hexaborane (10) is.

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  2. The name and formula of the compound of boron which is called 'inorgan...

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  3. What is not true about borax ?

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  4. White hybrid state of boron best explains the structures in B(2)H(6) ?

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  5. The unexpected order of acidic strength of the trihalides of boron can...

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  6. Borax bead test is based upon the formation of

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  7. Which of the followinf minerals does not contain aluminium ?

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  8. In which of the following, a salt of the type KMO(2) is obtained ?

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  9. Inorganic graphite is

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  10. Hydrated AlCl(3) is used as :

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  11. Borax is uded as a cleansing agent because on dissolving in water, it ...

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  12. Boric acid is polymeric due to :

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  13. The chemical formula of feldspar is

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  14. The chief impurity present in bauxite is

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  15. Al(2)O(3) can be converted to anhydrous AlCl(3) by heating :

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  16. Boric acid is used in carrom boards for smooth gliding of pawns becaus...

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  17. Aluminium chloride exists as a dimer, Al(2)Cl(6) in solid state as wel...

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  18. In which of the following molecules is hydrogen bridge bond present ?

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  19. Which of the following molecular hydride act as a Lewis acid ?

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  20. The stability of +1 oxidation state increases in the sequence :

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