**Match the following acids with their basicity (n-factor):**

**Column I:**
(A) Orthophosphoric acid ()
(B) Phosphorous acid ()
(C) Hypophosphorous acid ()
(D) Sulphuric acid (

Question

**Match the following acids with their basicity (n-factor):**

**Column I:**
(A) Orthophosphoric acid ($H_3PO_4$)
(B) Phosphorous acid ($H_3PO_3$)
(C) Hypophosphorous acid ($H_3PO_2$)
(D) Sulphuric acid ($H_2SO_4$)

**Column II:**
(P) $1$
(Q) $2$
(R) $3$
(S) $2$

Prashant Kotian · Accepted Answer

Correct answer: (A) $\RIGHTARROW$ R
(B) $\RIGHTARROW$ Q
(C) $\RIGHTARROW$ P
(D) $\RIGHTARROW$ Q. **(A)** has three P-OH bonds (tribasic).
**(B)** has two P-OH bonds (dibasic).
**(C)** has one P-OH bond (monobasic).
**(D)** has two ionizable hydrogens (dibasic).

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