Question

Which of the following is least volatile?

• A. $H_{2}O$
• B. $H_{2}S$
• C. $H_{2}Se$
• D. $H_{2}Te$

Answer 1

Answer: (A)

$H_{2}O$

Answer 2

Water $(H_{2}O)$ is least volatile due to the association of $H_{2}O$ molecules through hydrogen bonding. However hydrogen bonding is not present in other hydrides.