Question

Water is liquid at room temperature. Which of the following is the correct reason to justify it?
A. In water, the intermolecular forces are strong enough to keep its particle-bound with each other.
B. The melting point of water is below room temperature.
C. Its boiling point is above room temperature.
D. All of the above.

Answer 1

Hint: Water is liquid at room temperature that is 20 to 25 degrees Celsius. It will remain liquid till 100 degrees. After that, it will convert into steam. And at 0 degrees water starts to freeze, it becomes solid. In short, we can say that water is liquid between 0 degrees and 100 degrees. As room temperature is 25 degrees which lie in that range so water is liquid at room temperature.

Complete Step by step solution:
In a water molecule, the hydrogen atoms are not only covalently attached to their oxygen atoms but also attracted to other nearby oxygen atoms. This attraction is the basis of the hydrogen bonds.
Hydrogen bonding in a water molecule is strong enough to maintain the liquid state of water during thermal fluctuations at room temperatures.
According to the above points, option (A) is correct.
As we know the boiling point of water is ${{100}^{}}^{\circ }C$, which is ${212}^{\circ }F$ or 373.15K.
Also, we know that the melting point of water is ${0^{}}^{\circ }C$, which is ${32}^{\circ }F$ or 273.15 K.
Room temperature is considered as 20 to 25 degrees Celsius with an average of ${23}^{\circ }C$ or about ${71}^{\circ }F$ or 293 to 298 kelvins.
So it is clear that the melting point of water is below room temperature and the boiling point is above room temperature.
We can say that option (B) and option (C) both are correct.
All options are equally important to justify that water is liquid at room temperature hence option (D) all of the above is the correct answer.

Note: Similar to many other substances, water can take numerous forms. Its liquid phase, the most common phase of water on Earth, is the form that is generally meant by the word “water.”