Question

$H_{2}S$ is more acidic than $H_{2}O$ , due to:

• A. O is more electronegative than S
• B. 0-H bond is stronger than S-H bond
• C. O -H bond is weaker than S-H bond
• D. none of the above

Answer 1

Answer: (B)

Proton donors are acids. Between $H_{2}O$ and $H_{2}S$ the molecule which is having weaker bond, will give $H^{+}$ ion easily and hence more acidic.
$\because H_{2}S$ larger in size as compared to $H_{2}O$:
$\because H_{2}S$ can be dissociated easily and therefore it can easily give $H_4$ ions.
$\therefore H_{2}S$ is more acidic than $H_{2}O$.