Question

give one reason to justify that water is a liquid at room temperature

Answer 1

because its molecules are not as tightly packed as in solids........so the molecules always try to overcome others due to their intermolecular force of attraction and intermolecular space and thus it flows and is liquid in room temperature.

Answer 2

water solidifies at 0℃ and vaporizes at 100℃ Thus we can say that at room temperature i.e., at 25℃ water is in its liquid state