Of the follwing , the most acidic is .

Options

A. ` H_3 PO_4`
B. ` H_3AsO_4`
C. `H_3SbO_4`
D. `H_3BiO_4`

Answer

A

Explanation

`CH_(3)CH_(2)NO_(2) overset(HNO_(2))(rarr) CH_(3)underset("nitrolic acid")underset((blue))underset(" N-OH")underset(||)(C)-ON_(2) overset(NaOH)(rarr) CH_(3)underset((red))underset(" NONa")underset(||)C-NO_(2)`
`overset(CH_(3))overset(|)(CH_(3)CHNO_(2))overset(HNO_(2))(rarr)-overset(CH_(3))overset(|)underset(("blue"))underset("pseudonitrol")underset(" N=O")underset(|)(C)-NO_(2) overset(NHO_(2))(rarr)underset((blue))("noreaction")`
`(CH_(3))_(3)CNO overset (HnO_(2))(rarr)`.