Question

What is the effect on chemical and physical properties of water when temperature is changed?
A) Chemical properties of water remain the same but the physical state changes with change in temperature.
B) Chemical properties of water change with change in temperature but physical properties remain the same.
C) There is no effect of chemical or physical properties of water when temperature is changed.
D) Both chemical and physical properties change with change in temperature.

Answer 1

Hint: The answer to this question is based on the basic concepts of the universal solvent that is water. Here, there is change from one state of water to another state. The answer is based on this fact.

Complete answer:
In our physical chemistry part, we have come across the concepts of changes in the physical and chemical properties of many chemicals when subjected to thermal conditions.
Let us see the properties of water and the changes it undergoes when subjected to heat and cold conditions that are changes in temperature.
- We know that water is the most important component on earth and a major part of earth is covered by water rather than land.
- Water is the essential source for all the living creatures on earth and life doesn’t survive without water.
- water when subjected to the changes in temperature, undergoes several changes in its physical state. When water is heated continuously, the liquid form of water changes to vapour form and when water is subjected to the lower temperature, the liquid form changes to the solid form that is ice. Therefore, the physical state of water changes with the change in temperature. Water with several chemical properties like vapour pressure, surface tension, boiling point, freezing point, latent heat of vaporisation etc., are the same even if the physical state of water is changed as water is a neutral molecule.

Therefore the correct answer to this question is option A) Chemical properties of water remain the same but the physical state changes with change in the temperature.

Note: Water is called a universal solvent as it has the capacity to dissolve more substances than any other liquid and the changes in temperature only changes its physical state from solid-liquid-gas.