Question 32

Water can be boiled at room temperature by increasing the pressure.

Increasing the pressure on water raises its boiling point, allowing it to boil at temperatures that are otherwise below the standard boiling point of 100 degrees Celsius. This principle is utilized in pressure cookers and certain industrial processes.

A) By lowering the pressure

Lowering the pressure decreases the boiling point of water, which would allow it to boil at lower temperatures rather than boiling at room temperature. This option is incorrect as it contradicts the requirement to boil water at room temperature.

B) By increasing the pressure

Increasing the pressure allows water to boil at a higher temperature than its normal boiling point. This is the correct answer because it directly addresses the question of how water can boil at room temperature, which can be achieved through pressure adjustment.

C) By decreasing the volume

Decreasing the volume of water does not affect its boiling point. Instead, it simply changes the amount of water present without altering the conditions necessary for boiling. Therefore, this option is incorrect.

D) By raising the boiling point

Raising the boiling point does not provide a mechanism to boil water at room temperature. Instead, it suggests increasing the temperature required for boiling, which is contrary to the question's premise. Thus, this option is incorrect.

Conclusion

The correct answer is B, as increasing the pressure is the only method that allows water to boil at room temperature by elevating its boiling point. All other options either misinterpret the relationship between pressure and boiling point or do not apply to the scenario presented.