Which physical property is most commonly used to separate a mixture of sand and salt?

• A. Electrical conductivity
• B. Solubility
• C. Magnetism
• D. Color

Answer: (B)

Verified step by step guidance

1. Identify the components of the mixture: sand and salt.
2. Consider the physical properties of each component. Sand is generally insoluble in water, while salt is soluble in water.
3. Understand that solubility refers to the ability of a substance to dissolve in a solvent, such as water.
4. Use the property of solubility to separate the mixture by adding water, which will dissolve the salt but not the sand.
5. After dissolving the salt, filter the mixture to separate the sand, then evaporate the water to recover the salt.