Borax is correctly represented as $N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O$ . Number of tetrahedral boron atoms present are $x$ and number of $B - O - B$ bonds are $y$ . The value of $\frac{y}{x}$ is

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Solution

Structure of borax is: It has two tetrahedral boron atoms and five $B - O - B$ bonds.

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Q. Borax is actually made of two tetrahedral and two triangular units joined together and should be
written as :

N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O

.
Consider the following statements about borax:
1. Each boron atom has four B-O bonds
2. EAch boron atom has three B-O bonds
3. Two boron atoms have four B-O bonds while other two have three B-O bonds
4. Each boron atom has one-OH groups
Select correct statement(s) -

Borax is actually made of two tetrahedra and two triangular units joined together and should be written as: Na2[B4O5(OH)4]·8H2O

The correct statement/s about borax is/are:

a. Each boron atom has four B-O bonds

b. Each boron atom has three B-O bonds

c. Two boron atoms have four B-O bonds while other two have three B-O bonds

d. Each boron atom has one -OH groups

In the tetranuclear unit of borax $[B_{4} O_{5} (O H)_{4}]^{2 -}$ , the number of B – O – B bridges formed between $s p^{3}$ boron & $s p^{2}$ boron is ‘x’ and the number B-O-B bridges formed between $s p^{3}$ boron & $s p^{3}$ boron is ‘y’.
Then (x – y) is___

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:

Q. In the structure of borax, the numbers of boron atoms and B-O-B units, respectively, are :

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Borax is correctly represented as Na2[B4O5(OH)4].8H2O. Number of tetrahedral boron atoms present are x and number of B−O−B bonds are y. The value of yx is

Structure of borax is: It has two tetrahedral boron atoms and five B−O−B bonds.

Borax is correctly represented as $N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O$ . Number of tetrahedral boron atoms present are $x$ and number of $B - O - B$ bonds are $y$ . The value of $\frac{y}{x}$ is

Structure of borax is: It has two tetrahedral boron atoms and five $B - O - B$ bonds.