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B
1 mole of H2SO4
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C
1 mole of H3PO3
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D
2 moles of H3PO2
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Solution
The correct option is D2 moles of H3PO2 Ba(OH)2→diacidic 1×2=equivalents H2SO4→dibasic1×2=2equivalents H3PO4→dibasic1×2=2equivalents H3PO2→monobasic2×1=2equivalents