Borax is converted into crystalline boron by the following steps-Borax x - H 3 BO 3 Heat - B 2 O 3 Heat y - BX - Y are respectivelyA- H 2 SO 4- AlB- H 2 SO 4- CC- HCl - MgD- C- HCl

Na_2B_4O_7 + H_2SO_4+5H_2O→ Na_2SO_4 + 4H_3BO_3 2H_3BO_3 Heat⟶ B_2O_3+3H_2O B_2O_3+2Al⟶2B+Al_2O_3 ...

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Standard XII

Chemistry

Borax

Borax is conv...

Question

Borax is converted into crystalline boron by the following steps.

$B o r a x x ⟶ H_{3} B O_{3} H e a t ⟶ B_{2} O_{3} y ⟶ H e a t B$
X & Y are respectively

$H_{2} S O_{4}, A l$

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$H_{2} S O_{4}, C$

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$H C l, M g$

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$C, H C l$

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Solution

The correct option is A
$H_{2} S O_{4}, A l$

$N a_{2} B_{4} O_{7} + H_{2} S O_{4} + 5 H_{2} O \to N a_{2} S O_{4} + 4 H_{3} B O_{3}$
$2 H_{3} B O_{3} H e a t ⟶ B_{2} O_{3} + 3 H_{2} O$
$B_{2} O_{3} + 2 A l ⟶ 2 B + A l_{2} O_{3}$

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Similar questions

Borax is converted into crystalline boron by the following steps.

$B o r a x x ⟶ H_{3} B O_{3} H e a t ⟶ B_{2} O_{3} y ⟶ H e a t B$
X & Y are respectively

Q. Borax is converted into crystalline boron by the following steps:

B o r a x X \to H_{3} B O_{3} Δ \to B_{2} O_{3} Y - \to Δ B

Then

X

and

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are respectively:

Q. The following sequence of reactions are used to convert Borax into Boron.

N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O X - \to H_{3} B O_{3} △ - \to B_{2} O_{3} Y \to B B o r o n

Reagents X and Y are respectively:

In the following series of reactions

$N a C l + A \to B + H C l$ , $B + c o k e \to N a_{2} S + C O$

$N a_{2} S + C \to N a_{2} C O_{3} + C a S A$ , $B$ and $C$ are respectively

Q. Amorphous boron is extracted from borax following steps :

B o r a x (A) \to H_{3} B O_{3} H e a t \to B_{2} O_{3} (B) \to B o r o n

(A)

and

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Borax is converted into crystalline boron by the following steps. Boraxx⟶H3BO3Heat⟶B2O3y⟶HeatB X & Y are respectively

The correct option is A H2SO4, Al Na2B4O7 + H2SO4+5H2O→Na2SO4 + 4H3BO3 2H3BO3Heat⟶B2O3+3H2O B2O3+2Al⟶2B+Al2O3

Borax is converted into crystalline boron by the following steps.

$B o r a x x ⟶ H_{3} B O_{3} H e a t ⟶ B_{2} O_{3} y ⟶ H e a t B$
X & Y are respectively

The correct option is A
$H_{2} S O_{4}, A l$

$N a_{2} B_{4} O_{7} + H_{2} S O_{4} + 5 H_{2} O \to N a_{2} S O_{4} + 4 H_{3} B O_{3}$
$2 H_{3} B O_{3} H e a t ⟶ B_{2} O_{3} + 3 H_{2} O$
$B_{2} O_{3} + 2 A l ⟶ 2 B + A l_{2} O_{3}$