Question

At room temperature, a mixture of sand and water can be separated by

(1) ionization (3) filtration
(2) combustion (4) sublimation

Answer 1

A mixture of sand and water can be separated by filtration, which involves passing the mixture through a filter to separate the sand particles from the water.

Step-by-step explanation:

The mixture of sand and water can be separated by filtration.

Filtration is a physical method of separation that involves passing a mixture through a filter. In this case, the filter paper will allow the water to pass through while retaining the sand particles, resulting in the separation of the two substances.

For example, when you make coffee using a coffee filter, the hot water passes through the filter, but the coffee grounds are retained, giving you a clear cup of coffee.

Answer 2

The answer is (3) filtration.

Filtration is a process of separating solids from fluids. It is usually used for heterogeneous mixtures such is a mixture of sand and water. So, by adding a filtrate, through which a fluid can pass, solid particles are trapped in the filtrate. If you use a physical filter to separate water from sand, the sand will remain on the filter, while the water will pass through.