Sulfurous Acid Is a Diprotic Acid with K_a1 = 1

Sulfurous acid is a diprotic acid with K_a1 = 1.40 × 10⁻² and K_a2 = 6.73 × 10⁻⁸.Which of the statements below are FALSE?
I K_b2 = 7.14 × 10⁻¹³
II K_b1 = 1.49 × 10⁻⁷
III For 0.1 M H₂SO₃,[H⁺] = 7.61 × 10⁻² for K_a1.
IV For 0.1 M NaHSO₃,pH  4.515.

A) I,II,and IV
B) I,II,and III
C) I and II
D) I,II,III,and IV
E) II,III,and IV

Correct Answer:

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