Question

Which of the following substance can be used for drying neutral and basic gases?

• A. $N{a}_{2}C{O}_3$
• B. $CaC{O}_3$
• C. $CaO$
• D. $k_{2}C{O}_3$

Answer 1

The correct option is C $CaO$

Option $\left(C\right)$ is correct.

$CaO$ is used for drying neutral and basic gases. It is efficent drying agent that reacts by chemical combination rather than hydration the oxide and resulting hydroxide are stable to heat and are practically nonvolatile, consequently, the agent is easily removed. It is frequently used to dry low molecular weight alcohols and amines but cannot be used on acidic sensitive substances.