First slide

13th group or boron group

Question

Orthoboric acid on heating to 373K gives ____?

Difficult

A

$B C l_{3}$
B

$B_{2} H_{6}$
C

$H_{2} B_{4} O_{7}$
D

$H B O_{2}$

Solution

Following are the thermal decomposition reaction of boric acid.
$H_{3} B O_{3} \overset{100^{0} C}{\to} H B O_{2}$
$H_{3} B O_{3} \overset{160^{0} C}{\to} H_{2} B_{4} O_{7}$

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