name the technique used to separate a solid from a liquid.

The technique used to separate a solid from a liquid is called filtration. Filtration involves pouring the mixture through a filter medium such as filter paper, which allows the liquid to pass through while trapping the solid particles. This method is commonly used when the solid is insoluble in the liquid, for example, separating sand from water. The solid left behind on the filter is called the residue, and the liquid that passes through is called the filtrate.