Under which of the following conditions can we boil water at room temperature?

Correct option is C

The correct answer is (c) At low pressure.
· Boiling occurs when the vapor pressure of the liquid equals the external pressure surrounding the liquid. At room temperature, by reducing the external pressure to below the vapor pressure of water at that temperature, water can boil.
· In environments with low pressure, such as in a vacuum, the boiling point of water drops below the usual 100°C (212°F), allowing it to boil at room temperature.
Additional details on other options:
· At atmospheric pressure: At this pressure level, water boils at 100°C, which is significantly higher than typical room temperatures.
· At very high pressure and At high pressure: Both of these conditions actually raise the boiling point of water. Therefore, under high pressure, water requires a higher temperature than normal to reach boiling, making it impossible to boil at room temperature.