Question

The most efficient agent for the absorption of ${SO}_3$ is:

• A. $80$% $H_2{SO}_4$
• B. $98$% $H_2{SO}_4$
• C. $50$% $H_2{SO}_4$
• D. $20$% $H_2{SO}_4$

Answer 1

Answer: (B)

$98$% $H_2{SO}_4$

$\because$ $98$% $H_2{SO}_4$ is used for absorbing dense fog of acid which is formed by dissolving ${SO}_3$ in water.

$\therefore$ $98$% $H_2{SO}_4$ is the most efficient reagent for absorption of ${SO}_3$.