sepration of substanc

How can we separate oil and water from their mixture?

• Oil floats on water and form separate layer. Separating funnel can be used to separate the two.

• We are able to dissolve more solute in a solvent at high temperature

Why sieving is not used to separate very small stones from rice grains?

• Sieving is not used to separate very small stones from rice grains because both are of almost same size and both will pass through the holes of the sieve.

• Handpicking is a method used to separate larger impurities like pieces of dirt, stones etc. just by picking them out with the help of hand from the mixture.

Why are we able to dissolve more solute in a solvent at high temperature?

• Oil floats on water and form separate layer.

• We are able to dissolve more solute in a solvent at high temperature because high temperature facilitates dissolving reaction by providing energy to break bonds in the solid.

There are 3 beakers half filled with water. Now add 3 spoon of sugar in first beaker, 5 spoon of sugar in second beaker and 7 spoon of sugar in third beaker. Stir the solution of all three beakers. Which solution is more saturated?

• secound beaker

• Third beaker

• first beaker

what is Hand picking

• The process of conversion of water vapor into its liquid form

• Handpicking is a method used to separate larger impurities like pieces of dirt, stones etc. just by picking them out with the help of hand from the mixture.

what is Threshing

• Threshing is a method of separating grains or seeds from the stalks by some mechanical means such as by beating with a flail or by the action of a threshing machine.

• method used to separate larger impurities like pieces of dirt, stones etc. just by picking them out with the help of hand from the mixture.

define Evaporation

• The process of conversion of water into water vapor is called evaporation.

• The process of conversion of water vapor into its liquid form is called evaporation

define Saturated Solution

• A solution in which no more solute (such as sugar or salt) can be dissolved in the given amount of solvent (such as water) at a particular temperature is known as saturated solution.

• A solution in which more solute (such as sugar or salt) can be dissolved in the given amount of solvent (such as water) at a particular temperature is known as saturated solution.

define Unsaturated Solution

• A solution in which more solute (such as sugar or salt) can be dissolved in the given amount of solvent (such as water) at a particular temperature is known as unsaturated solution.

• solution in which no more solute (such as sugar or salt) can be dissolved in the given amount of solvent (such as water) at a particular temperature is known as unsaturated solution.

define Decantation

• Decantation is the process of removing liquid from mixture when heavier component settles down at the bottom of container.

• A mixture of soluble solid in liquid is called solution.