Which technique would you use to separate sand from water in a mixture?

• A. Filtration
• B. Chromatography
• C. Evaporation
• D. Distillation

Answer: (A)

Verified step by step guidance

1. Understand the physical properties of the components in the mixture: sand is a solid and water is a liquid.
2. Recall that filtration is a technique used to separate a solid from a liquid by passing the mixture through a filter that allows only the liquid to pass through.
3. Consider chromatography, which is typically used to separate components of a solution based on their different affinities to a stationary phase and a mobile phase, not suitable for solid-liquid separation like sand and water.
4. Evaluate evaporation and distillation, which involve changing the phase of the liquid (water) to separate it from dissolved substances, but sand is not dissolved in water, so these methods are less appropriate here.
5. Conclude that filtration is the most effective technique to separate sand from water because it physically separates the solid particles from the liquid without changing their states.