A) \[N{{a}_{2}}{{P}_{2}}{{O}_{7}}\]
B) \[N{{a}_{4}}{{P}_{2}}{{O}_{7}}\]
C) \[NaP{{O}_{4}}\]
D) \[N{{a}_{2}}P{{O}_{2}}\]
Correct Answer: B
Solution :
It is a salt of pyrophosphoric acid \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\].
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