Borax, disodium tetra borate is an important boron compound, a mineral, and a salt of boric acid. The number of terminal \[B\text{ }OH\] present in borax is
A) 3
B) 4
C) 5
D) 6
Correct Answer:
B
Solution :
Molecular formula of borax is \[N{{a}_{2}}{{B}_{4}}{{O}_{7}}\cdot 10\,{{H}_{2}}O\]