Q.

Number of tetrahedral boron atoms in peroxo-borate obtained by the following reaction.2NaBO2+2H2O2+6H2O→Na2B2OH4O226H2O

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a

2

b

3

c

1

d

0

answer is A.

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Detailed Solution

Following is the structure of sodium peroxo-borate. It finds its use as a whitener in washing powder.Both the B atoms are forming four bonds and so it is tetrahedral.
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