Ionisable hydrogens (basicity) of phosphorus oxoacids formed from phosphorus halides

1. A.
   $100\text{ }mL$ and $100\text{ }mL$
2. B.
   $100\text{ }mL$ and $50\text{ }mL$
3. C.
   $100\text{ }mL$ and $200\text{ }mL$
4. D.
   $50\text{ }mL$ and $50\text{ }mL$

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1. A.
   3
2. B.
   0
3. C.
   2
4. D.
   1

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1. A.
   0
2. B.
   2
3. C.
   1
4. D.
   3

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