Answer:

To determine the volume of a solid by immersing it in water, the solid should be heavier than water and insoluble in it. Let's understand why this is the correct answer:

Archimedes' Principle:
When a solid is immersed in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the solid. This principle, known as Archimedes' Principle, helps in determining the volume of the solid.

Buoyant Force:
The buoyant force acting on a submerged object is given by the formula:
Buoyant force = weight of the fluid displaced
= density of the fluid × volume of the fluid displaced × acceleration due to gravity

Comparing the Buoyant Force and Weight:
To determine the volume of a solid by immersing it in water, we need to compare the buoyant force acting on the solid with its weight.

1. If the solid is lighter than water, it will float on the water surface, and the weight of the solid will be less than the buoyant force. In this case, the solid will displace less water, and the volume determined using Archimedes' Principle will be incorrect.

2. If the solid is heavier than water, it will sink in water. Now, when we immerse it in water, the weight of the solid will be more than the buoyant force. As a result, the solid will displace more water, and the volume determined using Archimedes' Principle will be accurate.

3. If the solid is soluble in water, it will dissolve and mix with water. This will change the density of the water, making it difficult to accurately determine the volume of the solid.

Therefore, the correct answer is option A - the solid should be heavier than water and insoluble in it. This ensures that the solid sinks, displaces a specific volume of water, and allows for an accurate determination of its volume using Archimedes' Principle.