Question

Q2(a) Give reasons:
(2M)
Why do sugar and water retain their individual properties in a sugar solution?
II A magnet is used to separate a mixture of iron and sulphur.
(b) What is filtration? Name any two substances which can be used as filters. (2M)
(c) Why do we need pure substances?
(1M)
(2M)
Q3(a) Define the following terms.
1 Distillation
Sedimentation
(b) Select homogeneous and heterogeneous mixtures from the following:
(2M)
1) Petrol and water
2) Milk
3)Salt solution
4)Sand and water
(c) Why boiled water becomes tasteless?
(1M)
(2M)
Q4(a) Write any two differences between compound and mixture.
(2M)
(b) Name the process by which the components of following mixtures can
be separated.
1 Rice and small stones,
II Chaff and grain.
(1M)
(c) Name the condenser used in the process of distillation.​

Answer 1

Answer:

(a) As sugar solution is a mixture and mixtures has not any specific set of properties. They show the properties of the individual components from which they are formed

2)Hence, magnets can be used to separate iron from Sulphur. The main reason for using a magnet is that iron is magnetic in nature so when we move a magnet over their mixture, we will find that the magnet has attracted all the iron pieces from the mixture and has left the Sulphur behind.

Filtration Definition

Filtration is the separating of substances based on their different physical and chemical qualities. Typically, we think of it as the removal of solid particles from a mixture containing both solids and liquids. In this process, we refer to the collected solid material as the residue and the fluid material as the filtrate. Usually, a tool that contains some form of pores is used, which allows the fluid portion, but not the solid portion, to pass through. Different materials are used for the purpose of filtration, including paper, sand, and cloth. Filtration also occurs naturally in our bodies, for example in the kidneys, where the blood is filtered in a process called glomerular filtration.