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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_(4)O_(7)+HCl to NaCl+underset(" "darr Al)(H_(2)B_(4)O_(7))H_(2)O+Al_(2)O_(3)+B`
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Knowledge Check

  • Borax is converted into crystalline boron by the following steps Borax overset(x)rarrH_(3)BO_3overset(Y)underset(Delta)rarrB X and Y are respectively

    A
    HCl , Cu
    B
    HCl , C
    C
    C, Al
    D
    HCl, Al

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

    A
    `H_(2)B_(4)O_(7)`
    B
    `HNO_(2)`
    C
    `B_(2)O_(3)`
    D
    B

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

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

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