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Reported Question / Answer
Q.) Phosphoric acid has the formula
1)
H<sub>2</sub>PO<sub>4</sub>
2)
H<sub>2</sub>PO<sub>3</sub>
3)
H<sub>3</sub>PO<sub>3</sub>
4)
H<sub>3</sub>PO<sub>4</sub>
5)
NULL
Answer :
4
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Message / Correct Answer / Suggestion
Human Verification : Answer 2 + 3 = ?
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