Question

Which of the following oxyacids does not exist ?

• A. $H_3SbO_3$
• B. $HBiO_3$
• C. $H_3AsO_4$
• D. $H_3BiO_4$

Answer 1

Answer: (D)

$H_3BiO_4$

Answer 2

Arsenic forms two oxyacids $H _{3} AsO _{3}$ and $H _{3} AsO _{4} .$ Antimony forms only one oxyacid $H _{3} SbO _{3}$ and bismuth forms only one oxyacid $HBiO _{3}$. Therefore $H _{1} BiO$, does not exist.