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Borax is coverted into crystalline boron...

Borax is coverted into crystalline boron by the following steps
Borax `overset(" X ")rarr H_(3)BO_(3)overset(" Y ")underset(Deltas)rarr B`. X and Y are respectively

A

HCl , Cu

B

HCl , C

C

C, Al

D

HCl, Al

Text Solution

Verified by Experts

The correct Answer is:
D
`Na_(2)B_4O_7+HClrarrNaCl+H_2B_4O_7urarrAlH_2O+Al_2O_3+B`
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Knowledge Check

  • H_(3)BO_(3)overset(" Redhot ")rarr X . 'X' in the reaction is

    A
    `H_(2)B_(4)O_(7)`
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    `HNO_(2)`
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    D
    B

  • C_(2)H_(6)underset("air")overset(x,Delta)rarr Ethanoicacid, here 'X' is

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    `(CH_(3)COO)_(2)Mg`
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    acedified `KMnO_(4)`
    C
    `(CH_(3)COO)_(2)Mn`
    D
    `CH_(3)COONa`

  • Identify Z in the following series C_2H_5I overset(Alc. KOH)(rarr) X overset(Br_2)(rarr) Y overset(KCN)(rarr)Z

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    B
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    C
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