The number of hydroxyl group in pyrophosphoric acid is [KCET 1993]

1.	The number of hydroxyl group in pyrophosphoric acid is [KCET 1993]
A.	3
B.	4
C.	5
D.	7
Answer» C. 5

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The number of hydroxyl group in pyrophosphoric acid is [KCET 1993]

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