Which of the following is a separation technique that uses a porous barrier to separate a solid from a liquid?

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

Answer: (C)

Verified step by step guidance

1. Understand that the problem asks for a separation technique that uses a porous barrier to separate a solid from a liquid.
2. Recall the definitions of each technique: Evaporation removes a liquid by turning it into vapor, Distillation separates liquids based on boiling points, Chromatography separates components based on their movement through a medium, and Filtration uses a porous barrier to trap solids while allowing liquids to pass through.
3. Identify that the key characteristic is the use of a porous barrier, which is a filter medium that physically blocks solid particles but lets the liquid pass.
4. Match this characteristic to the technique of Filtration, which is specifically designed to separate solids from liquids using such a barrier.
5. Conclude that Filtration is the correct separation technique for this scenario.