Question

5. A student has a solution of salt, sand and water. Which option explains the processes required to separate the salt and sand from water?
a) Evaporation to remove sand, filtration to obtain salt
b) Filtration to remove sand, evaporation to obtain salt
c) Filtration to remove sand, sedimentation to obtain salt
d) Sedimentation to remove sand, filtration to obtain salt

Answer 1

Answer:

c) is the correct answer, it will help you to separate sand and salt from water.

Answer 2

Answer:

The correct answer is filtration to remoce sand, evaporation to obtainn salt.

Explanation:

Filtration : The process used to remove undissolved solute from a solution is known as filtration. Filtration is done with the help of filter paper or with other agents depending on the size of the solute.

Evaporation: This method is to remove components of a solution when they have different boiling points. One component with low boiling point is evaporated and another component with very high boiling remains in the container.

In this experiment, sand is in solid state, and it is not soluble either in salt or in water. It can be removed from the solution with the help of filtration. Now salt water solution can be separated into components by heating. On heating water is evaporated and salt remains in the vessel.

  So the correct option is B.