Choose CORRECT statement/ reaction regarding H3BO3: (ignore balancing) (I) H 3 BO 3+ NaOH ( aq ) arrow Na [ B ( OH ] (II) H 3 BO 3+ D 2 O leftharpoons[ B ( OH ( OD )]-1+ D 3 O +. (III) H 3 BO 3+ C 2 H 5 OH stackrelΔ longrightarrow A + H 2 O; A is also given when B 2 H 6 reacts with C 2 H 5 OH (IV) H 3 BO 3 is produced on hydrolysis or acidification of borax.

Question

Choose CORRECT statement/ reaction regarding H3BO3: (ignore balancing) (I) H 3 BO 3+ NaOH ( aq ) arrow Na [ B ( OH ] (II) H 3 BO 3+ D 2 O leftharpoons[ B ( OH ( OD )]-1+ D 3 O +. (III) H 3 BO 3+ C 2 H 5 OH stackrelΔ longrightarrow A + H 2 O; A is also given when B 2 H 6 reacts with C 2 H 5 OH (IV) H 3 BO 3 is produced on hydrolysis or acidification of borax. (A) I,IV only (B) I,II,III only (C) II,III only (D) I,II,III &IV

Tardigrade Admin · Accepted Answer

Boric acid is weak mono protic Lewis acid, it accept

O H^{-}

from

N a O H

and

O D^{-}

from

D_{2} O

to form a complex.
So reaction (i) and reaction (ii) are correct.
(I)

H_{3} B O_{3} + N a O H (a q) \to N a [B (O H]

(II)

H_{3} B O_{3} + 2 D_{2} O ⇌ [B (O H (O D)]^{- 1} + D_{3} O^{+}

Boric acid on reaction with ethanol form tri ethyl borate.
(III)

H_{3} (BO)_{3} + 3 C_{2} H_{5} O H \to Δ B ((OC)_{2} H_{5})_{3} + 3 H_{2} O

B ((OC)_{2} H_{5})_{3}

is also given when

B_{2} H_{6}

reacts with

C_{2} H_{5} O H

.
(IV)

H_{3} B O_{3}

is produced on hydrolysis or acidification of borax.

N a_{2} B_{4} O_{7} + 7 H_{2} O \to 2 N a O H + 4 H_{3} B O_{3}

$I, I V$ only

$I, II, III$ only

$II, III$ only

$I, II, III & I V$

I,IV only

I,II,III only

II,III only

I,II,III&IV

$I, I V$ only

$I, II, III$ only

$II, III$ only

$I, II, III & I V$