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In borax `(Na_(2)B_(4)O_(7).10H_(2)O)` the number of `B-OH` bonds present is :

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In borax `(Na_(2)B_(4)O_(7).10H_(2)O)` the number of `B-OH` bonds present is :
A. five
B. four
C. three
D. two
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Correct Answer - B
Correct formula of borax is , `Na_(2)[B_(4)O_(5)(OH)_(4)].8H_(2)O`
Thus, number of `B-OH` bonds = 4.
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