Thermal conductivity of water in general with rise in temperature

Thermal conductivity is a physical property that describes a material's ability to transfer heat through conduction.

For most liquids, including water, the behavior of thermal conductivity with respect to temperature is different from that of solids.

As the temperature of liquid water increases, its molecules gain kinetic energy and move more rapidly.

This increased molecular motion enhances energy transfer between molecules, causing the thermal conductivity to increase over most of the liquid range.

Therefore, thermal conductivity of water generally increases with rise in temperature, at least within the typical liquid temperature range (0°C to 100°C).

Option B (Decreases) and Option C (Remain constant) are incorrect because thermal conductivity is not constant or decreasing over the normal temperature range.

Option D (May increase or decrease depending on temperature) is also not suitable for this question, as the trend is generally increasing in the liquid phase.

Hence, the correct answer is: Increases (Option A).