First slide

13th group or boron group

Question

Orthoboric acid on heating to 373K gives

Moderate

A

${BCl}_{3}$
B

$B_{2} H_{6}$
C

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

${HBO}_{2}$

Solution

$H_{3} B O_{3} \overset{100^{0} C}{\to} {HBO}_{2}$
$H_{3} B O_{3} \overset{160^{0} C}{\to} H_{2} B_{4} O_{7}$

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