Question

The correct increasing order of acidity of ${CO_2, H_2O}$ and ${H_2O_2}$ is

• A. $\ce{CO_2 > H_2O_2 >H_2O}$
• B. $\ce{H_2O < H_2O_2 < CO_2}$
• C. $\ce{H_2O < H_2O_2 > CO_2}$
• D. $\ce{H_2O_2 > CO_2 >H_2O}$

Answer 1

Answer: (B)

$\ce{H_2O < H_2O_2 < CO_2}$

Answer 2

${CO_2}$ is a stronger acid than ${H_2O_2}$ since it liberates ${H_2O_2}$ from ${BaO_2}$. Water, of course, is a weaker acid than ${H_2O_2}$.