Question

Assertion (A): $H_{2}O$ is liquid while $H_{2}S$ is a gas at room temperature.
Reason (R): $H_{2}O$ has intermolecular hydrogen bonding while H-bonds are absent in $H_{2}S$.

• A. Both $A$ and $R$ are true and $R$ is the correct explanation of $A$.
• B. Both $A$ and $R$ are true and $R$ is not the correct explanation of $A$.
• C. $A$ is true but $R$ is false.
• D. $A$ is false but $R$ is true.

Answer 1

The correct option is A Both $A$ and $R$ are true and $R$ is the correct explanation of $A$.

$H_{2}O$ has intermolecular H-bonds, due to which intermolecular attractions are more in $H_{2}O$. Thus, it is a liquid at room temperature. While there is no H-bonding in $H_{2}S$ and thus it is a gas.