In structure of borax, numbers of boron atoms and B - O - B units, respectively are

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p-Block Elements - I

hard

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

A$4$ and $5$

B$4$ and $3$

C$5$ and $4$

D$5$ and $3$

(KVPY-2013)

Solution

(a) The structure of borax $H _4 B _4 O _9$ is shown below
$[Image]$
Thus, number of boron atoms are $4$ and $B – O – B$ units are $5.$

Standard 11

Chemistry

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