Question

A drying agent is not suitable for removing the water vapor from a sample of gas with which the drying agent reacts chemically. Which of the following gases can properly be dried by means of $NaOH$?

• A. ${CO}_2$
• B. ${SO}_2$
• C. $HBr$
• D. $O_2$
• E. $HCl$

Answer 1

The correct option is D $O_2$

Since $NaOH$ is basic, it cannot be dried using acidic drying agents because they form adducts. So, only $O_2$ can be dried using $NaOH$.